US Gold Corporation 15,000,000 Shares Common Stock (no par value per share) Underwriting Agreement February 17, 2011

constitutes a valid and binding obligation of the Company enforceable against the Company in accordance with its terms, except as enforcement thereof may be limited by bankruptcy, insolvency, reorganization, moratorium and other laws relating to or affecting the rights of creditors generally and except as limited by the application of equitable principles when equitable remedies are sought, and by the fact that rights to indemnity, contribution and waiver, and the ability to sever unenforceable terms, may be limited by applicable law.

(rr)           Except as disclosed in the Disclosure Package, the Final Prospectus, the Registration Statement, the Final Canadian MJDS Supplement and the Canadian MJDS Base Prospectus as at the date thereof, and except for (1) options to acquire 3,081,001 shares of Common Stock; (2) 4,446,863 exchangeable shares of Canadian Exchange Co.; (3) warrants to purchase 8,851,000 additional shares of Common Stock; (4) 464,668 shares of Common Stock upon the exercise of Nevada Pacific Gold stock options outstanding, (5) the issuance of Common Stock pursuant to the Mining Exploration Agreement with Purchase Option entered into by Minera Pangea, S.A De C.V, a Significant Subsidiary of the Company, on September 2, 2010, a s of the date hereof, no person has any right, agreement, option, warrant or other rights to purchase, present or future, contingent or absolute, or any right capable of becoming a right, agreement or option, warrant or other rights to purchase, for the issue or allotment of any shares of the Company or any other agreement, option, warrant or other rights to purchase, for the issue or allotment of any shares of the Company or any other security convertible into or exchangeable for any such shares or to require the Company to purchase, redeem or otherwise acquire any of the issued and outstanding shares of the Company, as the case may be.

(ss)          All statistical, market-related or forward-looking data included or incorporated by reference in the Disclosure Package, the Final Prospectus, the Registration Statement, the Final Canadian MJDS Supplement and the Canadian MJDS Base Prospectus are based on information that the Company believes to be reasonable.

(tt)           The information contained in, related to or derived from (a)(i) the NI-43-101 Technical Report for the Palmarito Project, Sinaloa State, Mexico, dated December 15, 2008, (ii) the Update of the Resource Estimate, Magistral Gold Project, Sinaloa, Mexico, dated June 18, 2009, (iii) the Initial Resource Estimate for the El Gallo Project, Sinaloa State, Mexico, dated August 17, 2010, (iv) the Resource Estimate for the El Gallo District, Sinaloa State, Mexico, dated December 23, 2010 and (v) the Preliminary Economic Assessment for the El Gallo District, Sinaloa State, Mexico, dated February 11, 2011, each prepared by Pincock, Allen &am p; Holt, (b) the Technical Report on the Tonkin Project, dated May 16, 2008, prepared by Micon International and Ore Reserves Engineering, and (c)(i) the NI 43-101 Preliminary Assessment of US Gold Corporation’s Gold Par Project, including Gold Pick, Gold Ridge, Cabin Creek and Hunter, dated April 15, 2010, (ii) the NI 43-101 Technical Report for the Gold Pick Project, expanded to include the Cabin Cree and Hunter Resources, dated may 5, 2009, (iii) the NI 43-101 Technical Report for the Limousine Butte Project, dated July 1, 2009 and

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(iv) the NI 43-101 Technical Report for the New Pass Project, dated December 23, 2009, each prepared by Telesto Nevada Inc., is based on or derived from sources that the Company reasonably believes to be reliable and accurate in all material respects and represent its good faith estimate that is made on the basis of data derived from such sources, and the Company has obtained the written consent to the use of such data from such sources to the extent required.

(uu)         The Common Stock, including the Securities, are duly listed, and admitted and authorized for trading, on the NYSE and the Toronto Stock Exchange, subject, in the case of the Securities, (i) with respect to the NYSE, to receipt of an approval letter and (ii) with respect to the Toronto Stock Exchange, to the receipt of a conditional approval letter and satisfaction of customary conditions required by such exchange.

(vv)         Except pursuant to this Agreement and as set forth in the Disclosure Package, the Final Prospectus, the Registration Statement, the Final Canadian MJDS Supplement and the Canadian MJDS Base Prospectus, neither the Company nor any of its subsidiaries has incurred any liability for any finder’s or broker’s fee or agent’s commission in connection with the execution and delivery of this Agreement or the consummation of the transactions contemplated hereby or by the Disclosure Package, the Final Prospectus, the Registration Statement, the Final Canadian MJDS Supplement and the Canadian MJDS Base Prospectus.

(ww)       Computershare Shareholder Services, Inc., at its office in the City of Lakewood, Colorado, has been duly appointed as registrar and transfer agent for the Common Stock of the Company.

(xx)        There are no reports or information that in accordance with the Canadian Securities Laws must be made publicly available or filed in connection with the offering of the Common Stock that have not been made publicly available as required.

Any certificate signed by any officer of the Company and delivered to the Underwriters or counsel for the Underwriters in connection with the offering of the Securities shall be deemed to be a representation and warranty by the Company, as to matters covered thereby, to each Underwriter.

2.             Purchase and Sale.

(a)           Subject to the terms and conditions and in reliance upon the representations and warranties herein set forth, the Company agrees to sell to each Underwriter, and each Underwriter agrees, severally and not jointly, to purchase from the Company, at the purchase price of US$6.11 per share, the amount of the Underwritten Securities set forth opposite such Underwriter’s name in Schedule I to this Agreement, provided, however, that each Underwriter shall pay US $6.50 per share for the 3,050,000 Securities purchased in the offering by Robert R. McEwen.

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(b)           Subject to the terms and conditions and in reliance upon the representations and warranties herein set forth, the Company hereby grants an option to the Underwriters to purchase, severally and not jointly, up to two million two hundred and fifty thousand (2,250,000) Option Securities at the same purchase price per share as the Underwriters shall pay for the Underwritten Securities.  Such option may be exercised in whole or in part (but in no event shall there be more than two settlement dates unless otherwise agreed to by the parties) to cover over-allotments at any time on or before the 30th day after the date of this Agreement upon written or telegraphic notice by the Underwriters to the Company setting forth the number of s hares of the Option Securities as to which the Underwriters are exercising the option and the settlement date.  The number of Option Securities to be purchased by each Underwriter shall be the same percentage of the total number of shares of the Option Securities to be purchased by the several Underwriters as such Underwriter is purchasing of the Underwritten Securities, subject to such adjustments as you in your absolute discretion shall make to eliminate any fractional shares.

3.             Delivery and Payment.  Delivery of and payment for the Underwritten Securities and the Option Securities (if the option provided for in Section 2(b) hereof shall have been exercised on or before the third Business Day prior to the Closing Date) shall be made at 8:30 A.M., New York City time, on February 24, 2011, or at such time on such later date not more than three Business Days after the foregoing date as the Lead Managers shall designate, which date and time may be postponed by agreement between the Lead Managers and the Company or as provided in Section 9 hereof (such date and time of delivery and payment for the Securities being her ein called the “Closing Date”).  Delivery of the Securities shall be made to the Underwriters for the respective accounts of each Underwriter against payment by each Underwriter of the respective aggregate purchase prices of the Securities being sold by the Company to or upon the order of the Company by wire transfer payable in same-day funds to the account specified by the Company.  Delivery of the Underwritten Securities and the Option Securities shall be made through the facilities of The Depository Trust Company unless the Lead Managers shall otherwise instruct.

If the option provided for in Section 2(b) hereof is exercised after the third Business Day prior to the Closing Date, the Company will deliver the Option Securities (at the expense of the Company) to the Lead Managers, in the amounts and on the date specified by the Lead Managers (which shall be within three Business Days after exercise of such option) for the respective accounts of the Underwriters, against payment by each Underwriter of the purchase price thereof to or upon the order of the Company by wire transfer payable in same-day funds to the account specified by the Company.  If settlement for the Option Securities occurs after the Closing Date, the Company will deliver to the Underwriters on the settlement date for the Option Securities, and the obligation of the Underwriters to purchase the Option Securities shall be conditioned upon receipt of, supplemental opinions, certificates and letters confirming as of such date the opinions, certificates and letters delivered on the Closing Date pursuant to Section 6 hereof.

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4.             Offering by Underwriters.  It is understood that the Underwriters propose to offer the Securities for sale to the public as set forth in the Disclosure Package, Final Prospectus and the Final Canadian MJDS Supplement and any such offer shall be in accordance with the selling restrictions set forth in Exhibit A hereto.

5.             Agreements.

The Company agrees with the Underwriters that:

(a)           Prior to the later of the last date on which a “settlement date”, if any, may occur, and the termination of the offering of the Securities, the Company will not file any amendment to the Registration Statement or supplement (including the Final Prospectus or the Preliminary Prospectus) to the Base Prospectus or supplement to the Canadian MJDS Base Prospectus (including the Final Canadian MJDS Supplement or the Preliminary Canadian MJDS Supplement) unless the Company has furnished you a copy for your review prior to filing and will not file any such proposed amendment or supplement to which you reasonably object, unless otherwise required by the Act, the Exchange Act or the MJDS Rule.  Subject to the foregoing sentenc e, the Company will cause the Final Prospectus and the Final Canadian MJDS Supplement, properly completed, and any supplement thereto to be filed in a form approved by the Lead Managers with the Commission or the Canadian Regulators, as the case may be, pursuant to the applicable paragraph of Rule 424(b) or the MJDS Rule within the time period prescribed and will provide evidence satisfactory to the Lead Managers of such timely filing.  The Company will promptly advise the Lead Managers (1) when the Final Prospectus and the Final Canadian MJDS Supplement, and any supplement thereto, shall have been filed (if required) with the Commission pursuant to Rule 424(b), or the Canadian Regulators pursuant to the MJDS Rule, as the case may be, (2) when, prior to termination of the offering of the Securities, any amendment to the Registration Statement shall have been filed or become effective, (3) of any request by the Commission or its staff for any amendment of the Registrati on Statement, or for any supplement to the Final Prospectus or for any additional information, (4) any request by the Canadian Regulators for any amendment to the Final Canadian MJDS Supplement or for any additional information, (5) of the Company’s intention to file, or prepare any supplement or amendment to, the Registration Statement, the Final Prospectus, the Final Canadian MJDS Supplement or any Issuer Free Writing Prospectus, (6) of the time when any amendment to the Final Canadian MJDS Supplement has been filed with or receipted by the Canadian Regulators, (7) of the issuance by the Commission or any Canadian Regulator of any stop order or cease trade order suspending the effectiveness of the Registration Statement or the Final Canadian MJDS Supplement or of any notice objecting to its use or the institution or threatening of any proceeding for that purpose, (8) of the receipt of any comments or communications from any Canadian Regulator, the Commission or any other regul atory authority relating to the Final Prospectus, the Final Canadian MJDS Supplement, the Registration Statement, or the listing of the Shares on the Toronto Stock Exchange or the NYSE, and (8) of the receipt by the Company of

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any notification with respect to the suspension of the qualification of the Securities for sale in any jurisdiction or the institution or threatening of any proceeding for such purpose.  The Company will use its best efforts to prevent the issuance of any such stop order or cease trade order or the occurrence of any such suspension or objection to the use of the Registration Statement and, upon such issuance, occurrence or notice of objection, to obtain as soon as possible the withdrawal of such stop order or cease trade order or relief from such occurrence or objection, including, if necessary, by filing an amendment to the Registration Statement or a new registration statement and using its best efforts to have such amendment or new registration statement declared effective as soon as practicable.

(b)           If, at any time prior to the filing of the Final Prospectus pursuant to Rule 424(b) or the filing of the Final Canadian MJDS Supplement pursuant to the MJDS Rule, any event occurs as a result of which the Disclosure Package, as of the Applicable Time, would include any untrue statement of a material fact or omit to state any material fact necessary to make the statements therein in the light of the circumstances under which they were made or the circumstances then prevailing not misleading, the Company will (1) notify promptly the Underwriters so that any use of the Disclosure Package may cease until it is amended or supplemented, (2) subject to the first sentence of paragraph (a) of this Section 5, am end or supplement the Disclosure Package to correct such statement or omission, and (3) supply any amendment or supplement to you in such quantities as you may reasonably request.

(c)           If, at any time when a prospectus relating to the Securities is required to be delivered under the Act (including in circumstances where such requirement may be satisfied pursuant to Rule 172) or the Canadian Securities Laws, any event occurs as a result of which the Final Prospectus as then supplemented or the Final Canadian MJDS Supplement as then supplemented would include any untrue statement of a material fact or omit to state any material fact necessary to make the statements therein in the light of the circumstances under which they were made at such time not misleading, or if it shall be necessary to amend the Registration Statement or the Canadian MJDS Base Prospectus, file a new registration statement, a new Canadian MJDS base prospectus or supplement the Final Prospectus or the Final Canadian MJDS Supplement to comply with the Act or the Exchange Act or the respective rules thereunder or Canadian Securities Laws, as the case may be, including in connection with the use or delivery of the Final Prospectus and the Final Canadian MJDS Supplement, the Company promptly will (i) notify the Underwriters of any such event, (ii) prepare and file with the Commission or the Canadian Regulators, as applicable, subject to the first sentence of paragraph (a) of this Section 5, an amendment or supplement, new registration statement, or new Canadian MJDS Base Prospectus which will correct such statement or omission or effect such compliance, (iii) use its best efforts to have any amendment to the Registration Statement or new registration statement declared effective, or amendment to the Canadian MJDS Base Prospectus or new Canadian MJDS base prospectus receipted, as applicable as soon as practicable in o rder to avoid any disruption in use of the Final Prospectus

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and the Final Canadian MJDS Supplement and (iv) supply any supplemented Final Prospectus and any supplemented Final Canadian MJDS Supplement to you in such quantities as you may reasonably request.

(d)           No later than the due date for the Company’s next quarterly report on Form 10-Q under the Exchange Act (as such date may be extended pursuant to and in compliance with Rule 12b-25 of the Exchange Act), the Company will make generally available to its security holders and to the Underwriters an earnings statement or statements of the Company and its subsidiaries which will satisfy the provisions of Section 11(a) of the Act and Rule 158.

(e)           The Company will use the net proceeds received by it from the sale of the Securities pursuant to this Agreement in the manner specified in the Disclosure Package, the Final Prospectus and the Final Canadian MJDS Supplement under the caption “Use of Proceeds.”

(f)            The Company will use its best efforts to list the Securities on the NYSE and the Toronto Stock Exchange, and during the period hereof until the date eighteen months from the date hereof, maintain the listing of the Common Stock, including the Securities listed on the NYSE, the Toronto Stock Exchange or another national stock exchange, and maintain its status as a “reporting issuer” under the applicable securities laws of the Canadian Jurisdictions and Quebec.

(g)           Concurrently with the filing of the Final Prospectus with the Commission as described in Section 1(a) above, the Company will fulfill all requirements of applicable Canadian Securities Laws to enable the Securities to be offered for sale and sold to the public in the Canadian Jurisdictions and will file with the Canadian Regulators the Final Canadian MJDS Supplement relating to the Securities and substantially in the form of the Final Prospectus with whatever additional items are required pursuant to the MJDS Rule.

(h)           If requested by the Lead Managers, the Company will furnish to the Lead Managers and counsel for the Underwriters signed copies of the Registration Statement (including exhibits thereto) and to each other Underwriter a copy of the Registration Statement (without exhibits thereto) and signed copies of the Canadian MJDS Base Prospectus and, so long as delivery of a prospectus by an Underwriter or dealer may be required by the Act (including in such circumstances where such requirement may be satisfied pursuant to Rule 172) or Canadian Securities Laws, as many copies of the Preliminary Prospectus, the Preliminary Canadian MJDS Supplement, the Final Prospectus, the Final Canadian MJDS Supplement, each Issuer Free Writing Prospectu s and any supplement thereto as the Underwriters may reasonably request.

(i)            The Company will arrange, if necessary, for the qualification of the Securities for sale under the laws of such jurisdictions as the Underwriters may designate and will maintain such qualifications in effect so long as required for the distribution of the Securities; provided that in no event shall the Company be obligated to

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qualify to do business in any jurisdiction where it is not now so qualified or to take any action that would subject it to service of process in suits, other than those arising out of the offering or sale of the Securities, in any jurisdiction where it is not now so subject.

(j)            The Company will not without the prior written consent of the Lead Managers, issue, offer, sell, contract to sell, pledge, or otherwise dispose of or enter into any transaction which is designed to, or might reasonably be expected to, result in the disposition (whether by actual disposition or effective economic disposition due to cash settlement or otherwise) by the Company or any affiliate of the Company, directly or indirectly, including the filing (or participation in the filing) of a registration statement or prospectus with the Commission or any Canadian Regulator or the Autorite des marches financiers in Quebec in respect of, or establish or increase a put equivalent position or liquidate or decrease a call equivalent position within the meaning of Section 16 of the Exchange Act, with respect to any other shares of Common Stock or any securities convertible into, or exercisable or exchangeable for, such Common Stock, or publicly announce an intention to effect any such transaction, for a period of 90 days after the date of this Agreement, except that the Company may (i) file a registration statement or prospectus with the Commission or the Canadian Regulators in respect of the Securities and sell the Securities to the Underwriters pursuant to this Agreement, (ii) issue and sell Common Stock or grant performance shares, stock appreciation rights, options or other equity-based awards pursuant to any employee stock option plan, stock ownership plan or dividend reinvestment plan of the Company in effect at the Execution Time, (iii) issue Common Stock issuable upon the conversion of securities or the exercise of warrants or options outstanding at the Execution Time, (iv) issue Common Stock to a seller in connection with the acquisition by the Company of mineral properties or other entities engaged in the mining business (including, without limitation, pursuant to an option agreement, joint venture or asset purchase), provided that the aggregate number of shares of Common Stock issued in connection with such transactions shall not exceed 10% of the number of shares of Common Stock outstanding as of the Closing Date; provided, that, except in the circumstances of an unsolicited bid, any such securities issued may not be subsequently disposed of until 90 days after the date of this Agreement by any recipient of such shares who, subsequent to such transaction, beneficially owns more than 1% of the Common Stock outstanding as of the Closing Date, or (v) issue 41,500 shares of Common Stock pursuant to the Mining Exploration Agreement w ith Purchase Option entered into by Minera Pangea, S.A De C.V, a Significant Subsidiary of the Company, on September 2, 2010.

(k)           To the extent that the Company is required, it has, and will, comply with all applicable securities (including Canadian Securities Laws) and other applicable laws, rules and regulations, including, without limitation, the Sarbanes Oxley Act, and will use its best efforts to cause the Company’s directors and officers, in their capacities as such, to comply with such laws, rules and regulations, including, without limitation, the provisions of the Sarbanes Oxley Act.

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(l)            The Company will not take, and will cause its subsidiaries not to take, directly or indirectly, any action designed to or that would constitute or that might reasonably be expected to cause or result in, under the Exchange Act or otherwise, stabilization or manipulation of the price of any security of the Company to facilitate the sale or resale of the Securities.

(m)          The Company will pay at the time of closing on the Closing Date all reasonable costs and expenses incident to the performance of its obligations under this Agreement, including (i) the preparation, printing and filing with the Commission or the Canadian Regulators, as the case may be, of (a) the Registration Statement (including financial statements and exhibits), the Preliminary Prospectus, the Final Prospectus and each Issuer Free Writing Prospectus, and each amendment and supplement to any of the foregoing, and (b) the Preliminary Canadian MJDS Base Prospectus, Canadian MJDS Base Prospectus, the Preliminary Canadian MJDS Supplement, the Final Canadian MJDS Supplement and each amendment and supplement to any of the foreg oing, (ii) the preparation and delivery to the Underwriters of this Agreement, any Agreement among Underwriters and such other documents as may be required in connection with the offering, purchase, sale, issuance or delivery of the Securities, (iii) the preparation, issuance and delivery of the certificates, as applicable, for any transfer taxes and any stamp or other duties payable upon the sale, issuance or delivery of the Securities to the Underwriters, (iv) the fees and disbursements of the Company’s legal counsel, accountants and other advisors, (v) the qualification of the Securities under applicable securities laws, and the NYSE and the Toronto Stock Exchange, including filing fees and, subject to Section 7 herein, the reasonable fees and disbursements of legal counsel for the Underwriters in connection therewith and in connection with the preparation of any Blue Sky Survey and any supplement thereto, (vi) the printing and delivery to the Underwriters of copies of t he Preliminary Prospectus, the Final Prospectus, each Issuer Free Writing Prospectus, the Preliminary Canadian MJDS Base Prospectus, the Canadian MJDS Base Prospectus, the Preliminary Canadian MJDS Supplement, the Final Canadian MJDS Supplement and all amendments or supplements to any of them and any costs associated with electronic delivery of any of the foregoing by the Underwriters to investors, (vii) the fees and expenses of any transfer agent or registrar for the Securities, and (viii) the costs and expenses of the Company relating to investor presentations on any “road show” undertaken in connection with the marketing of the Securities, including without limitation, expenses associated with the production of road show slides and graphics, fees and expenses of any consultants engaged in connection with the road show presentations, travel and lodging expenses of the representatives and officers of the Company and any such consultants.  Notwithstanding anything contained in this A greement to the contrary, the Underwriters agree that they shall not be entitled to any underwriting discount or commission with respect to any Underwritten Securities purchased by Robert R. McEwen.

(n)           The Company agrees that, unless it has or shall have obtained the prior written consent of the Lead Managers, and each Underwriter, severally and not jointly,

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agrees with the Company that, unless it has or shall have obtained the prior written consent of the Company, it has not made and will not make an offer relating to the Securities that would constitute an Issuer Free Writing Prospectus or that would otherwise constitute a “free writing prospectus” (as defined in Rule 405) required to be filed by the Company with the Commission or retained by the Company under Rule 433; provided that the prior written consent of the parties hereto shall be deemed to have been given in respect of the free writing prospectuses included in Schedule II hereto.  Any such free writing prospectus consented to by the Lead Managers or the Company is hereinafter referred to as a “Permitted Free Writing Prospectus.” The Company agrees that (1) it has treated and will treat, as the case may be, each Permitted Free Writing Prospectus as an Issuer Free Writing Prospectus and (2) it has complied and will comply, as the case may be, with the requirements of Rules 164 and 433 applicable to any Permitted Free Writing Prospectus, including in respect of timely filing with the Commission, legending and record keeping.

(o)           The Company shall provide the Lead Managers with a draft of any press release to be issued in connection with the Offering, and will provide the Lead Managers and their counsel sufficient time to comment thereon and will issue such press release in a form reasonably acceptable to the Lead Managers and their counsel.

6.             Conditions to the Obligations of the Underwriters.  The obligations of the Underwriters to purchase the Underwritten Securities and the Option Securities, as the case may be, shall be subject to the accuracy of the representations and warranties on the part of the Company contained herein as of the Execution Time, the Closing Date and any settlement date pursuant to Section 3 hereof, to the accuracy of the statements of the Company made in any certificates pursuant to the provisions hereof, to the performance by the Company of its obligations hereunder and to the following additional conditions:

(a)           The Final Prospectus and the Final Canadian MJDS Supplement and any supplement thereto have been filed with the Commission or the Canadian Regulators, as the case may be, in the manner and within the time period required by Rule 424(b) or the MJDS Rule, as the case may be; any other material required to be filed by the Company pursuant to Rule 433(d) shall have been filed with the Commission within the applicable time periods prescribed for such filings by Rule 433; any materials required to be filed by the Company pursuant to the MJDS Rule shall have been filed by the Company with the Canadian Regulators within the applicable time period; no stop order, or equivalent, suspending the effectiveness of t he Registration Statement or the Canadian MJDS Base Prospectus or any notice objecting to its use shall have been issued and no proceedings for that purpose shall have been instituted or, to the knowledge of the Company, threatened, and no stop order, or equivalent, suspending or preventing the use of the Preliminary Prospectus, the Final Prospectus, any Issuer Free Writing Prospectus, the Preliminary Canadian MJDS Supplement or the Final Canadian Supplement shall have been issued by the Commission or any Canadian Regulator, as applicable, and no proceedings for that purpose shall have been

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initiated or, to the knowledge of the Company, threatened by the Commission or any Canadian Regulator, as applicable.

(b)           The Underwriters shall have reviewed confirmation from each of Hogan Lovells US LLP, Dufford & Brown, P.C. and Fraser Milner Casgrain LLP that there are no claims to which its representation has been sought and that are outstanding in respect of the Company.

(c)           The Company shall have requested and caused each of Hogan Lovells US LLP and Dufford & Brown, P.C., each U.S. counsel for the Company, and Fraser Milner Casgrain LLP, Canadian counsel for the Company, to have furnished to the Underwriters their opinions (and Rule 10b-5 negative assurance letter in the case of Dufford &Brown, P.C.) substantially in the forms set forth in Exhibits B-1 (U.S. Counsel opinion) and B-2 (Canadian counsel opinion) hereto, respectively, dated the Closing Date and any settlement date and addressed to the Underwriters.  In the case of the opinion to be provided by Fraser Milner Casgrain LLP, they may rely on the opinions of local counsel acceptable to the Underwriters, acting reaso nably, as to the qualification of the Securities for sale to the public and as to other matters governed by the laws of jurisdictions in Canada other than the provinces in which they are qualified to practice.

(d)           The Company shall have caused the Underwriters to receive favorable title opinions dated the Closing Date regarding the Tonkin property, the Limosine Butte property, the New Pass property, the Gold Bar property, including the Gold Pick/Ridge, Hunter and Cabin Creek locations, the Magistral property, the El Gallo Project and the Palmarito Project, each in form and substance reasonably satisfactory to the Underwriters and counsel for the Underwriters.

(e)           The Underwriters shall have received the written opinion and Rule 10b-5 negative assurance letter of Skadden, Arps, Slate, Meagher and Flom LLP, the Underwriters’ United States counsel, dated the Closing Date and addressed to the Underwriters, with respect to such matters as the Underwriters may require, and the Company shall have furnished to Skadden, Arps, Slate, Meagher and Flom LLP such documents as they may reasonably request for the purpose of enabling them to pass upon such matters.

(f)            The Company shall have furnished to the Underwriters a certificate of the Company, signed by the Chief Executive Officer and the Chief Financial Officer of the Company or any other officers of the Company acceptable to the Underwriters in their discretion, dated the Closing Date and any settlement date, to the effect that the signers of such certificate have carefully examined the Registration Statement, the Disclosure Package, the Final Prospectus, the Canadian MJDS Base Prospectus and the Final Canadian MJDS Supplement and any supplements or amendments thereto and this Agreement and that:

(i)            the representations and warranties of the Company in this Agreement are true and correct on and as of the Closing Date and any settlement date

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with the same effect as if made on the Closing Date and any settlement date and the Company has complied with all the agreements and satisfied all the conditions on its part to be performed or satisfied at or prior to the Closing Date and any settlement date;

(ii)           no stop order or equivalent suspending the effectiveness of the Registration Statement or the Canadian MJDS Base Prospectus or any notice objecting to its use has been issued and no proceedings for that purpose have been instituted or, to the Company’s knowledge, threatened;

(iii)          since the date of the most recent financial statements included or incorporated by reference in the Disclosure Package, the Final Prospectus and the Final Canadian MJDS Supplement (exclusive of any supplement thereto), there has been no Material Adverse Effect; and

(iv)          the Company has complied with the terms and conditions of this Agreement on its part to be complied with up to the time of closing on the Closing Date.

(g)           The Underwriters shall have received on and as of the Closing Date and any settlement date, as the case may be, satisfactory evidence of the good standing of the Company and its subsidiaries in its jurisdiction of organization in writing from the appropriate governmental authority of such jurisdiction.

(h)           The Company shall have requested and caused KPMG, LLP (Toronto, Canada) to have furnished to the Underwriters, at the Execution Time and at the Closing Date and any settlement date, letters (which may refer to letters previously delivered to the Underwriters), dated respectively as of the Execution Time and as of the Closing Date and any settlement date, in form and substance satisfactory to the Underwriters, confirming that it is an independent registered public accounting firm within the meaning of the Act and the Exchange Act and covering, without limitation, the Company’s audited financial statements for the years ended December 31, 2008 and 2009 and the various financial disclosures related thereto contained in the R egistration Statement, the Preliminary Prospectus, the Final Prospectus and the Issuer Free Writing Prospectuses, if any.

(i)            The Company shall have requested and caused KPMG, LLP (Denver, U.S.) to have furnished to the Underwriters, at the Execution Time and at the Closing Date and any settlement date, letters (which may refer to letters previously delivered to the Underwriters), dated respectively as of the Execution Time and as of the Closing Date and any settlement date, in form and substance satisfactory to the Underwriters, confirming that it is an independent registered public accounting firm within the meaning of the Act and the Exchange Act and covering, without limitation, the Company’s audited financial statements for the year ended December 31, 2007 and the various financial disclosures related thereto contained in the Registra tion Statement, the Preliminary Prospectus, the Final Prospectus and the Issuer Free Writing Prospectuses, if any.

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(j)            Subsequent to the Execution Time or, if earlier, the dates as of which information is given in the Registration Statement and Canadian MJDS Base Prospectus (exclusive of any amendment thereof) and the Final Prospectus and Final Canadian MJDS Supplement (exclusive of any amendment or supplement thereto), there shall not have been (A) any change or decrease specified in the letters referred to in paragraphs (h) and (i) of this Section 6 or (B) any Material Adverse Effect, the effect of which, in any case referred to in clause (A) or (B) above, is, in the sole judgment of the Lead Managers, so material and adverse as to make it impractical or inadvisable to proceed with the offering or del ivery of the Securities as contemplated by the Registration Statement (exclusive of any amendment thereof), the Disclosure Package and the Final Prospectus (exclusive of any amendment or supplement thereto).

(k)           Prior to the Closing Date and any settlement date, the Company shall have furnished to the Underwriters such further information, certificates and documents as the Underwriters may reasonably request.

(l)            The Securities shall have been approved for listing on the NYSE and, prior to the Closing Date, the Securities shall have been conditionally approved for listing, subject to the satisfaction of the customary conditions, on the Toronto Stock Exchange, subject only to official notice of issuance, and satisfactory evidence of such actions shall have been provided to the Underwriters.

(m)          At the Execution Time, the Company shall have furnished to the Lead Managers a letter substantially in the form of Exhibit C to this Agreement from each officer and director of the Company.

If any of the conditions specified in this Section 6 shall not have been fulfilled when and as provided in this Agreement, or if any of the opinions and certificates mentioned above or elsewhere in this Agreement shall not be reasonably satisfactory in form and substance to the Lead Managers and counsel for the Underwriters, this Agreement and all obligations of the Underwriters hereunder may be canceled at, or at any time prior to, the Closing Date by the Lead Managers.  Notice of such cancellation shall be given to the Company in writing or by telephone or facsimile confirmed in writing.

The documents required to be delivered by this Section 6 shall be delivered at the office of Skadden, Arps, Slate, Meagher and Flom LLP, United States counsel for the Underwriters, at 222 Bay Street, Suite 1750, Toronto, Ontario M5K 1J5, on the Closing Date.

7.             Reimbursement of Underwriters’ Expenses.  Whether or not the transactions contemplated herein shall be completed, the Company shall reimburse the Underwriters on demand for all documented out-of-pocket costs and expenses (including reasonable fees and disbursements of U.S. and Canadian legal counsel in an amount not to exceed US$300,000)  that shall have been incurred by them in connection with the proposed purchase and sale of the Securities.

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8.             Indemnification and Contribution.

(a)           The Company agrees to indemnify and hold harmless each Underwriter, the directors, officers, employees and agents of each Underwriter and each person who controls any Underwriter within the meaning of either the Act or the Exchange Act against any and all losses, claims, damages or liabilities, joint or several, to which they or any of them may become subject under the Act, the Exchange Act, the applicable Canadian Securities Laws or other federal, state or provincial statutory law or regulation, at common law or otherwise, insofar as such losses, claims, damages or liabilities (or actions in respect thereof) arise out of or are based upon (1) any untrue statement or alleged untrue statement of a material fact contained in the Registration Statement, or Base Prospectus, the Preliminary Prospectus or any other preliminary prospectus supplement relating to the Securities, the Final Prospectus or any Issuer Free Writing Prospectus, the Preliminary Canadian MJDS Base Prospectus, the Canadian MJDS Base Prospectus, the Preliminary Canadian MJDS Supplement and the Final Canadian MJDS Supplement, or in any amendment thereof or supplement thereto, or arise out of or are based upon the omission or alleged omission to state therein a material fact required to be stated therein or necessary to make the statements therein not misleading, and (2) any misrepresentation (as defined by Canadian Securities Laws) contained in the Preliminary Canadian MJDS Base Prospectus, the Canadian MJDS Base Prospectus, the Preliminary Canadian MJDS Supplement and the Final Canadian MJDS Supplement, or in any amendment thereof or supplement thereto, and agrees to reimburse each such indemnified party, as incurred, for any legal or other expenses reasonably incurred by them in connection with investigating or defending any such loss, claim, damage, liability or action; provided, however, that the Company will not be liable in any such case to the extent that any such loss, claim, damage or liability arises out of or is based upon any such untrue statement or alleged untrue statement or omission or alleged omission made therein in reliance upon and in conformity with written information furnished to the Company by or on behalf of any Underwriter through the Underwriters specifically for inclusion therein.  This indemnity agreement will be in addition to any liability that the Company may otherwise have.

(b)           Each Underwriter severally and not jointly agrees to indemnify and hold harmless the Company, each of its directors, each of its officers who signs the Registration Statement, and each person who controls the Company within the meaning of either the Act or the Exchange Act to the same extent as the foregoing indemnity from the Company to each Underwriter, but only with reference to written information relating to such Underwriter furnished to the Company by or on behalf of such Underwriter specifically for inclusion in the documents referred to in the foregoing indemnity, it being understood and agreed that the only such information furnished by or on behalf of any Underwriter consists of the information described as such in the le tter agreement between you and the Underwriters dated the date hereof.  This indemnity agreement will be in addition to any liability that any Underwriter may otherwise have.

(c)           Promptly after receipt by an indemnified party under this Section 8 of notice of the commencement of any action, such indemnified party will, if a claim in

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respect thereof is to be made against the indemnifying party under this Section 8, notify the indemnifying party in writing of the commencement thereof, but the failure so to notify the indemnifying party (i) will not relieve it from liability under paragraph (a) or (b) above unless and to the extent it did not otherwise learn of such action and such failure results in the forfeiture by the indemnifying party of substantial rights and defenses and (ii) will not, in any event, relieve the indemnifying party from any obligations to any indemnified party other than the indemnification obligation provided in paragraph (a) or (b) above.  The indemnifying party shall be entitled to appoint counsel of the indemnifying party’s choice at the indemnifying party’s expense to represent the indemnified party in any action for which indemnification is sought (in which c ase the indemnifying party shall not thereafter be responsible for the fees and expenses of any separate counsel retained by the indemnified party or parties except as set forth below); provided, however, that such counsel shall be satisfactory to the indemnified party.  Notwithstanding the indemnifying party’s election to appoint counsel to represent the indemnified party in an action, the indemnified party shall have the right to employ separate counsel (including local counsel), and the indemnifying party shall bear the reasonable fees, costs and expenses of such separate counsel if (i) the use of counsel chosen by the indemnifying party to represent the indemnified party would present such counsel with an irreconcilable conflict of interest, (ii) the actual or potential defendants in, or targets of, any such action include both the indemnified party and the indemnifying party and the indemnified party shall have reasonably concluded that there may be legal defenses available to it and /or other indemnified parties which are different from or additional to those available to the indemnifying party, (iii) the indemnifying party shall not have employed counsel satisfactory to the indemnified party to represent the indemnified party within a reasonable time after notice of the institution of such action or (iv) the indemnifying party shall authorize the indemnified party to employ separate counsel at the expense of the indemnifying party.  An indemnifying party will not, without the prior written consent of the indemnified parties, settle or compromise or consent to the entry of any judgment with respect to any pending or threatened claim, action, suit or proceeding in respect of which indemnification or contribution may be sought hereunder (whether or not the indemnified parties are actual or potential parties to such claim or action) unless such settlement, compromise or consent (A) includes an unconditional release of each indemnified party from all liability arising ou t of such claim, action, suit or proceeding, and (B) does not include a statement as to, or an admission of, fault, culpability or a failure to act by, or on behalf of, any indemnified party.

(d)           In the event that the indemnity provided in paragraph (a) or (b) of this Section 8 is unavailable to or insufficient to hold harmless an indemnified party for any reason, the Company and the Underwriters severally agree to contribute to the aggregate losses, claims, damages and liabilities (including legal or other expenses reasonably incurred in connection with investigating or defending the same) (collectively “Losses”) to which the Company and one or more of the Underwriters may be subject in such proportion as is appropriate to reflect the

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relative benefits received by the Company and by the Underwriters from the offering of the Securities (except as may be provided in any agreement among underwriters relating to the offering of the Securities); provided, however, that in no case shall any Underwriter be responsible for any amount in excess of the underwriting discount or commission applicable to the Securities purchased by such Underwriter hereunder. If the allocation provided by the immediately preceding sentence is unavailable for any reason, the Company and the Underwriters severally shall contribute in such proportion as is appropriate to reflect not only such relative benefits but also the relative fault of the Company and of the Underwriters in connection with the statements or omissions which resulted in such Losses, as well as any other relevant equitable considerations.  Benefits received by the Company shall be deemed to be equal to the total net proceeds from the offering (before deducting expenses) received by it, and benefits received by the Underwriters shall be deemed to be equal to the total underwriting discounts and commissions, in each case as set forth on the cover page of the Final Prospectus.  Relative fault shall be determined by reference to, among other things, whether any (1) untrue or any alleged untrue statement of a material fact or the omission or alleged omission to state a material fact or (2) a misrepresentation (as defined by Canadian Securities Laws) relates to information provided by the Company on the one hand or the Underwriters on the other, the intent of the parties and their relative knowledge, access to information and opportunity to correct or prevent such untrue statement or omission.  The Company and the Underwriters agree that it would not be just and equitable if contribution were determined by pro rata allocation or any other method of allocation which does not take account of the equitable considerations referred to above.  Notwithstanding the provisions of this paragraph (d), no person guilty of fraudulent misrepresentation (within the meaning of Section 11(f) of the Act) shall be entitled to contribution from any person who was not guilty of such fraudulent misrepresentation.  For purposes of this Section 8, each person who controls an Underwriter within the meaning of either the Act or the Exchange Act and each director, officer, employee and agent of an Underwriter shall have the same rights to contribution as such Underwriter, and each person who controls the Company within the meaning of either the Act or the Exchange Act, each officer of the Company who shall have signed the Registration Statement and each director of the Company shall have the same rights to contribution as the Company, subject in each case to the applicable terms and conditions of this paragraph (d).

9.                                     Default by an Underwriter.

(a)                                If any Underwriter or Underwriters shall default in its or their obligation to purchase Securities hereunder, and if the Securities with respect to which such default relates (the “Default Securities”) do not (after giving effect to arrangements, if any, made by the Lead Managers pursuant to subsection (b) below) exceed in the aggregate 10% of the number of Securities, each non-defaulting Underwriter, acting severally and not jointly, agrees to purchase from the Company that number of Default Securities that bears the same proportion of

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the total number of Default Securities then being purchased as the number of Securities set forth opposite the name of such non-defaulting Underwriter in Schedule I hereto bears to the aggregate number of Securities set forth opposite the names of the non-defaulting Underwriters, subject, however, to such adjustments to eliminate fractional shares as the Lead Managers in their sole discretion shall make.

(b)                                In the event that the aggregate number of Default Securities exceeds 10% of the number of Securities, the Lead Managers may in their discretion arrange for themselves or for another party or parties (including any non-defaulting Underwriter or Underwriters who so agree) to purchase the Default Securities on the terms contained herein.  In the event that within five calendar days after such a default the Lead Managers do not arrange for the purchase of the Default Securities as provided in this Section 9, this Agreement shall thereupon terminate, without liability on the part of the Company with res pect thereto (except in each case as provided in Sections 7, 8 and 11) or the  non-defaulting Underwriters, but nothing in this Agreement shall relieve a defaulting Underwriter or Underwriters of its or their liability, if any, to the other Underwriters and the Company for damages occasioned by its or their default hereunder.

(c)                                 In the event that any Default Securities are to be purchased by the non-defaulting Underwriters, or are to be purchased by another party or parties as aforesaid, the Lead Managers or the Company shall have the right to postpone the Closing Date or settlement date, as the case may be for a period, not exceeding five business days, in order to effect whatever changes may thereby be made necessary in the Registration Statement, the Final Prospectus or the Final Canadian MJDS Supplement or in any other documents and arrangements, and the Company agrees to file promptly any amendment or supplement to the Re gistration Statement, the Final Prospectus or the Final Canadian MJDS Supplement which, in the opinion of Underwriters’ United States and Canadian counsel, may thereby be made necessary or advisable.  The term “Underwriter” as used in this Agreement shall include any party substituted under this Section 9 with like effect as if it had originally been a party to this Agreement with respect to such Securities.

10.                              Termination.

(a)                                This agreement shall be subject to termination in the absolute discretion of the Underwriters, by notice given to the Company prior to delivery of and payment for the Securities, if at any time prior to such time (a) trading in the Company’s Common Stock shall have been suspended by the Commission, the NYSE or the Toronto Stock Exchange or trading in securities generally on the NYSE or the Toronto Stock Exchange shall have been suspended or limited or minimum prices shall have been established on such exchange, or (b) a general banking moratorium shall have been declared by Canadian or U.S. fe deral, New York State or Ontario provincial authorities or (c) there shall have occurred any outbreak or escalation of hostilities, or a declaration by the United States or

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Canada of a national emergency or war, major terrorist attack in a world commercial financial center, or other calamity or crisis, including a health epidemic, the effect of which on financial markets is such as to make it, in the sole judgment of the Underwriters, impracticable or inadvisable to proceed with the offering or delivery of the Securities as contemplated by the Preliminary Prospectus, the Preliminary Canadian MJDS Supplement, the Final Prospectus or the Final Canadian MJDS Supplement (exclusive of any amendment or supplement thereto).

(b)                                Exercise of Termination Rights. The rights of termination contained in Section 10(a) may be exercised by the Underwriters and are in addition to any other rights or remedies any of the Underwriters may have in respect of any default, act or failure to act or non-compliance by the Company in respect of any of the matters contemplated by this Agreement or otherwise. In the event of any such termination, there shall be no further liability on the part of the Underwriters to the Company or on the part of the Company to the Underwriters except in respect of any liability which may have arisen prior to o r arise after such termination under Sections 8 and 14.  A notice of termination given by an Underwriter under Section 10(a) shall not be binding upon any other Underwriter who has not also executed such notice.

11.                              Representations and Indemnities to Survive.  The respective agreements, representations, warranties, indemnities and other statements of the Company or its officers and of the Underwriters set forth in or made pursuant to this Agreement will remain in full force and effect, regardless of any investigation made by or on behalf of any Underwriter or the Company or any of the officers, directors, employees, agents or controlling persons referred to in Section 8 hereof, and will survive delivery of and payment for the Securities.  The provisions of Section s 7 and 8 hereof shall survive the termination or cancellation of this Agreement.

12.                              Notices.  All communications hereunder will be in writing and effective only on receipt, and, if sent to the Underwriters, will be mailed, delivered or telefaxed to (a) Dahlman Rose & Company, LLC, 1301 Avenue of the Americas, 44th Floor, New York, NY 10019, attention: Robert Brinberg (fax no.: (212) 920-2952) (b) GMP Securities L.P., 145 King Street West, Suite 300, Toronto, Ontario, Canada M5H 1J8, attention: Doug Bell (fax no.: (416) 943-6160), with a copy to Skadden, Arps, Slate, Meagher and Flom LLP, counsel for the Underwriters, at 222 Bay Street, Suite 1750, Toronto, Ontario M5K 1J5, attention: Riccardo A. Leofanti (fax no.: (416) 777-4783); or, if sent to the Company, will be mailed, delivered or telefaxed to US Gold Corporation, 99 George Street 3rd Floor, Toronto, Ontario, Canada MS4 2N4, attention: Rob McEwen, (fax no.: (647) 258-0408), with a copy to Hogan Lovells US LLP, 1200 Seventeenth Street, Suite 1500, Denver, Colorado 80202, attention: George Hagerty (fax no.: (303) 899-7333) and to Fraser Milner Casgrain LLP, 77 King Street West, Suite 400, Toronto, Ontario, Canada M5K OA1, Attention:  Michael Melanson, (fax no.: (416) 863-4592).

13.                              Successors.  This Agreement will inure to the benefit of and be binding upon the parties to this Agreement and their respective successors and the officers, directors, employees,

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agents and controlling persons referred to in Section 8 hereof, to the extent set forth in Section 8 hereof, and no other person will have any right or obligation hereunder.

14.                              Severability. If any provision of this Agreement is determined to be void or unenforceable in whole or in part, it shall be deemed not to affect or impair the validity of any other provision of this Agreement and such void or unenforceable provision shall be severable from this Agreement.

15.                              Applicable Law.  This Agreement will be governed by and construed in accordance with the laws of the State of New York applicable to contracts made and to be performed within the State of New York.

16.                              Counterparts.  This Agreement may be signed in one or more counterparts, each of which shall constitute an original and all of which together shall constitute one and the same agreement.

17.                              Headings.  The section headings used herein are for convenience only and shall not affect the construction hereof.

18.                              Definitions.  The terms that follow, when used in this Agreement, shall have the meanings indicated.

“Act” shall mean the U.S. Securities Act of 1933, as amended, and the rules and regulations of the Commission promulgated thereunder.

“Applicable Time” shall mean 5:05 p.m. (New York City and Toronto time) on February 17, 2011.

“Base Prospectus” shall mean the base prospectus referred to in Section 1(a) hereof contained in the Registration Statement at the Effective Date.

“Business Day” shall mean any day other than a Saturday, a Sunday or a legal holiday or a day on which banking institutions or trust companies are authorized or obligated by law to close in New York City and Toronto.

“Canadian Securities Laws” means the securities acts or similar statues of the Canadian Jurisdictions and all applicable regulations, rules, policy statements, national instruments including the MJDS Rule, notices and blanket orders or rulings thereunder and includes any decision document providing for the eligibility of the Company to use the MJDS Rule;

“Commission” shall mean the U.S. Securities and Exchange Commission.

“Disclosure Package” shall mean (i) the Preliminary Prospectus or Preliminary Canadian MJDS Supplement used most recently prior to the Applicable Time, (ii) the Issuer Free Writing Prospectuses, if any, identified in Schedule II hereto, (iii) any other Free Writing Prospectus that the parties hereto shall hereafter expressly agree in writing to treat as part of the Disclosure Package and (iv) the pricing information set forth on Schedule III.

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“Effective Date” shall mean each date and time that the Registration Statement, any post-effective amendment or amendments thereto became or becomes effective.

“Exchange Act” shall mean the U.S. Securities Exchange Act of 1934, as amended, and the rules and regulations of the Commission promulgated thereunder.

“Execution Time” shall mean the date and time that this Agreement is executed and delivered by the parties to this Agreement.

“Final Canadian MJDS Supplement” shall mean the prospectus supplement relating to the Securities that was first filed pursuant to the MJDS Rule after the Execution Time, together with the Canadian MJDS Base Prospectus.

“Final Prospectus” shall mean the prospectus supplement relating to the Securities that was first filed pursuant to Rule 424(b) after the Execution Time, together with the Base Prospectus.

“Issuer Free Writing Prospectus” shall mean an issuer free writing prospectus, as defined in Rule 433.

“Material Adverse Effect” shall mean any event that (i) is reasonably likely to be expected to have a material adverse effect on the performance of this Agreement or the consummation of any of the transactions contemplated hereby; or (ii) could reasonably be expected to have a material adverse effect on the condition (financial or otherwise), prospects, earnings, business, assets, liabilities (contingent or otherwise) or properties of the Company and its subsidiaries, taken as a whole, whether or not arising from transactions in the ordinary course of business.

“Preliminary Canadian MJDS Supplement” shall mean any preliminary prospectus supplement to the Canadian MJDS Base Prospectus, including any amendment thereto, referred to in the preamble of this Agreement, which is used prior to the filing of the Final Canadian MJDS Supplement, together with the Canadian MJDS Base Prospectus.

“Preliminary Prospectus” shall mean the preliminary prospectus supplement to the Base Prospectus referred to in Section 1(a) hereof that is used prior to the filing of the Final Prospectus, together with the Base Prospectus.

“Registration Statement” shall mean the registration statement referred to in Section 1(a) hereof including exhibits and financial statements and any prospectus supplement relating to the Securities that is filed with the Commission pursuant to Rule 424(b) and deemed part of such registration statement pursuant to Rule 430B, as amended, on each Effective Date and, in the event any post-effective amendment thereto becomes effective prior to the Closing Date, shall also mean such registration statement as so amended.

“Rule 158”, “Rule 163”, “Rule 164”, “Rule 172”, “Rule 405”, “Rule 415”, “Rule 424”, “Rule 430B”, “Rule 433” refer to such rules under the Act.

“Significant Subsidiary” shall mean each significant subsidiary of the Company as

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defined by Rule 1-02 of Regulation S-X or listed on Exhibit D attached hereto.

19.                              Arm’s Length Transaction.  The Company acknowledges and agrees that the Underwriters are acting solely in the capacity of an arm’s length contractual counterparty to the Company with respect to the offering of Securities contemplated hereby (including in connection with determining the terms of the offering) and not as a financial advisor or a fiduciary to, or an agent of, the Company or any other person.  Additionally, no Underwriters are advising the Company or any other person as to any legal, tax, investment, accounting or regulatory matters i n any jurisdiction.  The Company shall consult with its own advisors concerning such matters and shall be responsible for making its own independent investigation and appraisal of the transactions contemplated hereby, and the Underwriters shall have no responsibility or liability to the Company with respect thereto.  Any review by the Underwriters of the Company, the transactions contemplated hereby or other matters relating to such transactions will be performed solely for the benefit of the Underwriters and shall not be on behalf of the Company.

This Agreement supersedes all prior agreements and understandings (whether written or oral) between the Company and the Underwriters, or any of them, with respect to the subject matter hereof.

[Signature Page to follow]

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If the foregoing is in accordance with your understanding of our agreement, please sign and return to us the enclosed duplicate hereof, whereupon this letter and your acceptance shall represent a binding agreement between the Company and the several Underwriters.

The foregoing Agreement is hereby confirmed and accepted as of the date first above written.

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SCHEDULE I

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SCHEDULE II

SCHEDULE OF FREE WRITING PROSPECTUSES INCLUDED IN THE

DISCLOSURE PACKAGE

None.

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SCHEDULE III

PRICING INFORMATION

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EXHIBIT A

Selling Restrictions

(a)                                 The Company agrees that the Underwriters will be permitted to appoint, at their sole expense, other registered dealers or brokers as their agents to assist in the distribution of the Securities. The Underwriters shall, and shall require any such dealer or broker, other than the Underwriters, with which the Underwriters have a contractual relationship in respect of the distribution of the Securities (a “Selling Firm”), to comply with the Canadian Securities Laws and the applicable provisions of the Act in connection with the distribution of the Securities and shall offer the Securiti es for sale to the public directly and through Selling Firms upon the terms and conditions set out in the Final Prospectus, the Final Canadian MJDS Supplement and this Agreement. The Underwriters shall, and shall require any Selling Firm, to offer for sale to the public and sell the Shares only in those jurisdictions where they may be lawfully offered for sale or sold.

(b)                                Notwithstanding the foregoing, an Underwriter will not be liable for any breach under this Exhibit A by another Underwriter if the Underwriter first mentioned is not itself also in breach of this Exhibit A.

(c)                                 Dahlman shall offer the Securities for sale to the public only in the U.S.

(d)                                For the purposes of this Exhibit A, GMP shall be entitled to assume that the Securities are qualified for distribution in any Canadian Jurisdiction.

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EXHIBIT B-1

Company U.S. Counsel Opinion

Hogan Lovells US LLP

1.                                      The Company has the necessary corporate power and authority to execute and deliver the (i) Agreement and (ii) each of the Registration Statement, the Base Prospectus, the Preliminary Prospectus, the Final Prospectus and any Issuer Free Writing Prospectus (collectively, the “Prospectuses”), and the Canadian MJDS Base Prospectus, the Preliminary Canadian MJDS Supplement, the Final Canadian MJDS Supplement and any Issuer Free Writing Prospectus which is required to be executed and delivered to the Canadian Regulators in any Canadian Jurisdiction, (collectiv ely, the “Canadian Prospectuses”). All necessary corporate action has been taken by the Company to authorize the execution and delivery by it of the Agreement and each Prospectus and Canadian Prospectus and the performance by the Company of its obligations thereunder.  The Agreement has been duly authorized, executed and delivered by the Company.

2.                                      When issued in accordance with the provisions of the Agreement, the Securities will be validly issued, fully paid and non-assessable.

3.                                      Based solely upon telephone communications between an attorney of this firm and a member of the Securities and Exchange Commission (“SEC”) staff, the Registration Statement has become effective under the Securities Act. To our knowledge, no stop order suspending the effectiveness of the Registration Statement or suspending or preventing the use of the preliminary prospectus filed with the SEC on April 29, 2009 or any other prospectus filed pursuant to Rule 424(b) promulgated pursuant to the Securities Act (collectively, the “Prospectus”) has been issued and no proceedings for that purpose have been instituted or are threatened by the SEC. The required filings of the Prospectus pursuant to Rule 424(b) have been made in the manner and within the time period required by Rule 424(b).

4.                                      On the Effective Date, the Registration Statement (except for the financial statements and supporting schedules included therein, as to which we express no opinion) did, and when the Final Prospectus is first filed in accordance with Rule 424(b) and on the date hereof, the Final Prospectus (and any supplement thereto) (except for the financial statements and supporting schedules included therein, as to which we express no opinion) complied as to form in all material respects with the applicable requirements of the Act; as of the Applicable Time and the date hereof, the D isclosure Package (except for the financial statements and supporting schedules included therein, as to which we express no opinion), complied as to form in all material respects with the requirements of the Act.

5.                                      The execution, delivery and performance on the date hereof by the Company of

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the Agreement do not (i) violate the Corporation Act or the Articles of Incorporation or Bylaws of the Company, or (ii) violate any provision of Applicable Federal Law or any provision of Applicable State Law.

6.                                      No approval or consent of, or registration or filing with, any federal governmental agency or any Colorado governmental agency is required to be obtained or made by the Company under Applicable Federal Law or Applicable State Law or under the Corporation Act in connection with the execution, delivery and performance on the date hereof by the Company of the Agreement.

7.                                      The Securities have been authorized for listing by the NYSE.

8.                                      The Company is not, and immediately following the issuance and sale of the Securities and the application of the proceeds thereof as described in the Final Prospectus will not be an ‘investment company’ within the meaning of the Investment Company Act of 1940, as amended.

9.                                      The Information in the Preliminary Prospectus and the Final Prospectus under the caption “Material United States Federal Income Tax Considerations for Non-U.S. Holders,” to the extent that such information constitutes matters of law or legal conclusions has been reviewed by us and is accurate in all material respects.

Dufford & Brown, P.C. (or local counsel with respect to Significant Subsidiaries incorporated outside of Colorado)

1.                                      Each of the Company and its U.S. Significant Subsidiaries has been duly incorporated or organized, as the case may be, and is in good standing under the laws of the jurisdiction of its incorporation or organization with full corporate power and authority to own or lease, as the case may be, and to operate its properties and conduct its business as described in the Disclosure Package and the Final Prospectus

2.                                      Each of the Company and its U.S. Significant Subsidiaries is duly qualified to do business as a foreign corporation under the laws of each jurisdiction which requires such qualification and in which the failure to qualify would have a Material Adverse Effect.

3.                                      None of the issue and sale of the Securities, the execution and delivery by the Company of the Agreement and the consummation of any other of the transactions contemplated by the Agreement or the fulfillment of the terms thereof will conflict with, result in a breach or violation of, or result in the imposition of any lien, charge or encumbrance upon any property or assets of the Company or any of its subsidiaries pursuant to (1) the organizational documents of the Company or its subsidiaries, (2) the terms of any indenture, contract, lease, mortgage, deed of trust, note agreement, loan agreement or other agreement, obligation, condition, covenant or instrument which is either described in the Registration Statement, Disclosure Package and the Final Prospectus or filed or

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incorporated by reference as an exhibit to the Registration Statement or any document incorporated by reference in the Registration Statement, Base Prospectus, the Preliminary Prospectus and the Final Prospectus and governed by the laws of Colorado or the federal laws of the United States, (3) the Colorado Business Corporation Act, or any U.S. federal or to our knowledge, any other U.S. statute, law, rule or regulation, or (4) to our knowledge, any judgment, writ, injunction, ruling, order or decree of any U.S. court, regulatory body, administrative agency, governmental body, arbitrator or other authority having jurisdiction over the Company or its subsidiaries or any of its or their properties.

4.                                      The authorized capital stock of the Company conforms in all material respects to the description thereof contained in the Disclosure Package and the Final Prospectus.  As of February 11, 2011, and to the best of our knowledge, 117,744,447 shares of common stock and one share of Series A Special Voting Preferred Stock of the Company are issued and outstanding and 4,446,683 exchangeable shares of US Gold Canadian Acquisition Corporation are issued and outstanding.  The outstanding shares of Common Stock have been duly and validly authorized and issued and are ful ly paid and non-assessable.

5.                                      The Common Stock, including the Securities, are free of statutory preemptive rights and preemptive rights under the Company’s organizational documents and, to our knowledge, contractual preemptive rights, resale rights, rights of first refusal and similar rights.

6.                                      Computershare Shareholder Services, Inc. has been duly appointed by the Company as the Transfer Agent and registrar for the Common Stock, including the Securities.

7.                                      To our knowledge, except as described in the Registration Statement, the Disclosure Package and the Final Prospectus, no person has the right, pursuant to the terms of any contract, agreement or other instrument, to cause the Company to register under the Act any additional Common Stock not already registered or shares of any other share capital or other equity interest of the Company, or to include any such shares or interest in the Registration Statement, the Disclosure Package or the Final Prospectus or the offering contemplated thereby.

8.                                      To our knowledge, the Company is not an “ineligible issuer” (as defined in Rule 405 under the Act) as of the eligibility determination date for purposes of Rules 164 and 433 under the Act with respect to the offering of the Securities contemplated by the Registration Statement, the Preliminary Prospectus and the Final Prospectus.

9.                                      The statements in the Preliminary Prospectus and the Final Prospectus under the headings “Risk Factors — Risks Related to Our Company — Our ongoing operations and past mining activities are subject to environmental risks, which could expose us to significant liability and delay, suspension or termination of our operations”, “— Legislation has been proposed that would significantly affect the

44

mining industry” insofar as such statements summarize U.S. legal matters, agreements, documents or proceedings discussed therein, are accurate summaries of such legal matters, agreements, documents or proceedings.

10.                                The statements in the Preliminary Prospectus and the Final Prospectus under the headings “Description of Common Stock” and in the Base Prospectus under the heading “Description of Securities We May Offer,” and “Description of Capital Stock” insofar as such statements purport to summarize the terms of the Company’s capital stock and Common Stock, constitute accurate summaries of the terms of the Company’s capital stock and the Common Stock in all material respects.

11.                                To our knowledge, no action, suit or proceeding by or before any court or governmental agency, authority or body, domestic or foreign, or any arbitrator involving the Company or any of its Significant Subsidiaries or its or their property is pending or, to the knowledge of the Company, threatened that (i) challenges the validity or enforceability, or seeks to invalidate or enjoin the performance of the, Underwriting Agreement or (ii) could reasonably be expected to have a Material Adverse Effect, except as set forth in the Disclosure Package and the Final Prospectus.

12.                                The documents incorporated by reference in the Registration Statement, the Prospectus and the Disclosure Package (except for the financial statements and supporting schedules therein, as to which we express no opinion)), when they were filed with the SEC, complied as to form in all material respects with the requirements of the Exchange Act.

In addition, such opinion shall also contain a statement that such counsel has participated in conferences with officers and representatives of the Company, representatives of the independent public accountants for the Company and the Underwriters at which the contents of the Registration Statement, the Disclosure Package and the Final Prospectus and related matters were discussed and no facts have come to the attention of such counsel which lead such counsel to believe that (A) the Registration Statement, at the time it became effective (including the information deemed to be part of the Registration Statement at the time of effectiveness pursuant to Rule 430B), or any amendment thereof made prior to the Closing Date, as of the date of such amendment, contained any untrue statement of a material fact or omitted to state any material fact required to be stated therein or necessary to make the statements therein not misleading, or (B) the Final Prospectus, as of its date (or any amendment thereof or supplement thereto made prior to the Closing Date as of the date of such amendment or supplement) and as of the Closing Date, contained or contains an untrue statement of a material fact or omitted or omits to state any material fact required to be stated therein or necessary to make the statements therein, in light of the circumstances under which they were made, not misleading; or (C) the Disclosure Package, as of the Applicable Time and as of the Closing Date, contained or contains an untrue statement of a material fact or omitted or omits to state any material fact required to be stated therein or necessary to make the statements therein, in light of the circumstances under which they were made, not misleading (it being understood that

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such counsel need express no belief or opinion with respect to the financial statements and schedules and other financial data included or incorporated by reference therein).

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EXHIBIT B-2

Canadian Counsel Opinion

1.                                      Each Canadian Significant Subsidiary has been duly incorporated or organized, as the case may be, and is validly existing in good standing under the laws of the jurisdiction of its incorporation or organization with full corporate power and authority to own or lease its assets, as the case may be, and to operate its properties and conduct its business.

2.                                      Each Canadian Significant Subsidiary is duly qualified or registered to do business as a foreign corporation and is in good standing under the laws of each jurisdiction which requires such qualification.

3.                                      The Company is a reporting issuer, or the equivalent thereof in each of the Canadian Jurisdictions that recognizes the concept of reporting issuer status, and the Company is not included on a list of defaulting reporting issuers maintained by any of the Canadian Regulators that maintain such lists.

4.                                      All documents have been filed, all requisite proceedings have been taken and all legal requirements have been fulfilled by the Company to qualify the Securities for distribution and sale to the public in each of the Canadian Jurisdictions through investment dealers or brokers registered under the applicable laws of the Canadian Jurisdictions who have complied with the relevant provisions of such applicable laws.

5.                                      None of the issue and sale of the Securities, the execution and delivery by the Company of the Agreement and the consummation of any other of the transactions contemplated by the Agreement or the fulfillment of the terms thereof will conflict with, result in a breach or violation of, or result in the imposition of any lien, charge or encumbrance upon any property or assets of the Company or any of its subsidiaries pursuant to (1) the organizational documents of the Canadian Significant Subsidiaries, (2) the terms of any indenture, contract, lease, mortgage, deed of trust , note agreement, loan agreement or other agreement, obligation, condition, covenant or instrument which is either described in the Canadian MJDS Base Prospectus, the Preliminary Canadian MJDS Supplement and the Final Canadian MJDS Supplement or any document incorporated by reference in the Canadian MJDS Base Prospectus, the Preliminary Canadian MJDS Supplement and the Final Canadian MJDS Supplement and governed by the laws of the provinces of Canada and the applicable federal laws therein and identified in this opinion, or (3) the MJDS Rule, or any other Canadian statute, law, rule, or regulation.

6.                                      No consent, approval, authorization, filing with or order of any governmental agency or body, or, to our knowledge, any court, or the approval of the Company’s shareholders, is required in Canada in connection with the transactions contemplated by the Agreement, except (1) such exemptive relief as has been obtained by the Company from the Canadian Regulators in connection with the requirement with respect to reconciliation of the Company’s financial statements pursuant to NI 71-101, and (2) such as may be required by the Toronto Stock Exchange.

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7.                                      The listing of the Securities on the Toronto Stock Exchange has been conditionally approved by the Toronto Stock Exchange, subject to the Company filing all of the documentation referred to in the letter of the Toronto Stock Exchange dated February · 2011 on or before February ·, 2011.

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EXHIBIT C

Form of Lock-Up Agreement

Lock-Up Agreement

February     , 2011

Dahlman Rose & Company, LLC

GMP Securities L.P.

Ladies and Gentlemen:

This agreement (“Lock-Up Agreement”) is being delivered to you in connection with the underwriting agreement (the “Underwriting Agreement”) entered into by US Gold Corporation, a Colorado corporation (the “Company”), and you with respect to the offering (the “Offering”) of common stock, no par value per share, of the Company (the “Common Stock”).  Capitalized terms used herein without definition shall have the respective meanings ascribed to them in the Underwriting Agreement.

The execution and delivery by you of this Lock-Up Agreement is a condition to the closing of the Offering.  In consideration of the closing of the Offering and other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the undersigned agrees that, for a period (the “Lock-Up Period”) beginning on the date hereof and ending on, and including, the date that is 90 days after the date of the underwriting agreement relating to the Offering, the undersigned will not, without the prior written consent of both of Dahlman Rose & Company, LLC and GMP Securities L.P. (i) offer, sell, contract to sell, pledge, transfer, assign or otherwise dispose of (including, without limitation, by making any short sale, engage in any hedging, monetization or derivative transaction) or file (or participate in the filing of) a registration statement, pr ospectus or other Canadian securities offering document, with the U.S. Securities and Exchange Commission or any Canadian Regulator (the “Commissions”) in respect of, or establish or increase a put equivalent position or liquidate or decrease a call equivalent position within the meaning of Section 16 of the U.S. Securities Exchange Act of 1934, as amended (the “Exchange Act”), and the rules and regulations of the Commissions promulgated thereunder with respect to, any Common Stock or any other securities of the Company that are substantially similar to Common Stock, or any securities convertible into or exchangeable or exercisable for, or any warrants or other rights to purchase, the foregoing, (ii) enter into any swap or other arrangement that transfers to another, in whole or in part, any of the economic consequences of ownership of Common Stock or any other securities of the Company that are substantially similar to Common Stock, or any securities convertible into or exc hangeable or exercisable for, or any warrants or other rights to purchase, the foregoing, whether any such transaction is to be settled by delivery of Common Stock or such other securities, in cash or otherwise or (iii) publicly announce an intention to effect any transaction specified in clause (i) or (ii).  The foregoing sentence shall not apply to (a) transfers of shares of Common Stock or any security convertible into or exercisable or exchangeable for Common Stock disposed of as bona fide gifts, (b) transactions by the undersigned relating to shares of Common Stock or other securities acquired in open market transactions after the completion of

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the Offering, (c) entry into written trading plans for the sale or other disposition  by the undersigned of Common Stock for purposes of complying with Rule 10b5-1 of the Exchange Act (“10b5-1 Plans”), provided that no sales or other distributions pursuant to a 10b5-1 Plan may occur until the expiration of the Lock-Up Period, (d) transfers by the undersigned of shares of Common Stock or any security convertible into or exercisable or exchange able for Common Stock as a result of testate, intestate succession or bona fide estate planning, (e) transfers by the undersigned to a trust, partnership, limited liability company or other entity, the majority of the beneficial interests of which are held, directly or indirectly, by the undersigned, (f) distributions by the undersigned of shares of Common Stock or any security convertible into or exercisable or exchangeable for Common Stock to limite d partners or stockholders of the undersigned and (g) the exercise of an option or warrant or the conversion of a security outstanding on the date of this Lock-up Agreement by the undersigned pursuant to the Company’s stock option and stock purchase plans; provided that in the case of any such permitted transfer or distribution pursuant to clause (a), (d), (e), (f) or (g), each transferee or distribute shall sign and deliver a lock-up letter substantially in the form of this Lock-Up Agreement.

The undersigned further agrees that, during the Lock-Up Period, the undersigned will not, without the prior written consent of both of Dahlman Rose & Company, LLC and GMP Securities L.P., make any demand for, or exercise any right with respect to, the registration (or equivalent) of Common Stock or any securities convertible into or exercisable or exchangeable for Common Stock, or warrants or other rights to purchase Common Stock or any such securities.

If (i) during the period that begins on the date that is 15 calendar days plus three business days before the last day of the Lock-Up Period and ends on the last day of the Lock-Up Period, the Company issues an earnings release or material news or a material event relating to the Company or any of its material mineral properties occurs; or (ii) if prior to the expiration of the Lock-Up Period, the Company announces that it will release earnings results during the 16-day period beginning on the last day of the Lock-Up Period, then the restrictions imposed by this Lock-Up Agreement shall continue to apply until the expiration of the date that is 15 calendar days plus three business days after the date on which the issuance of the earnings release or the material news or material event occurs; provided, however, this sentence will not apply if, within three days of the termination of the Lock-Up Period, the Company delivers to both Dahlman Rose & Company, LLC and GMP Securities L.P. a certificate, signed by the Chief Financial Officer or Chief Executive Officer of the Company, certifying on behalf of the Company that the Company’s shares of Common Stock are, as of the date of delivery of such certificate, are “actively traded securities,” within the meaning of Conduct Rule 2711(f)(4) of Financial Industry Regulatory Authority, Inc. Such notice shall be delivered in accordance with Section 12 of the Underwriting Agreement.

The undersigned hereby confirms that the undersigned has not, directly or indirectly, taken, and hereby covenants that the undersigned will not, directly or indirectly, take, any action designed, or which has constituted or will constitute or might reasonably be expected to cause or result in the stabilization or manipulation of the price of any security of the Company to facilitate the sale or resale of the shares of Common Stock. The undersigned hereby authorizes the Company and its transfer agent, during the Lock-Up Period, to decline the transfer of or to

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note stop transfer restrictions on the stock register and other records relating to shares of Common Stock or other securities subject to this Lock-Up Agreement.

This Lock-Up Agreement constitutes the entire agreement and understanding between and among the parties with respect to the subject matter of this Lock-Up Agreement and supersedes any prior agreement, representation or understanding with respect to such subject matter.

This Lock-Up Agreement shall be governed by and construed in accordance with the laws of the State of New York applicable to contracts made and performed within the State of New York.

*     *     *

If (a) the Company notifies you in writing that it does not intend to proceed with the Offering, (b) the registration statement filed with the Commission with respect to the Offering is withdrawn or (c) for any reason the Underwriting Agreement shall be terminated prior to the “time of purchase” (as defined in the Underwriting Agreement), this Lock-Up Agreement shall be terminated and the undersigned shall be released from its obligations hereunder.

[Signature Page to Follow]

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EXHIBIT D

Significant Subsidiaries

Tonkin Springs Gold Mining Company, a Colorado corporation

U.S. Environmental Corporation, a Colorado corporation

US Gold Alberta ULC, an Alberta corporation

US Gold Holdings Corporation, a Delaware corporation

US Gold Canadian Acquisition Corporation, an Alberta corporation

Nevada Pacific Gold Ltd, a British Columbia corporation

Tone Resources Limited, a British Columbia corporation

White Knight Resources Ltd., a British Columbia corporation

Tonkin Springs LLC, a Delaware limited liability company

Tonkin Springs Venture Limited Partnership, a Nevada limited partnership

Pangea Resources, Inc., an Arizona corporation

Minera Pangeo S.A. de C.V., a Mexican corporation

Nevada Pacific Gold (US) Inc., a Nevada corporation

Tone Resources (US) Inc., a Nevada corporation

White Knight Gold (US) Inc., a Delaware corporation

WKGUS LLC, a Nevada limited liability company

Golden Pick LLC, a Nevada limited liability company

NPGUS LLC, a Nevada limited liability company

TCIUP LLC, a Nevada limited liability company

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