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Exhibit 23.4

[Letterhead of Mine Development Associates]

CONSENT OF MINE DEVELOPMENT ASSOCIATES

        The undersigned, Mine Development Associates, hereby states as follows:

        Our firm assisted with technical studies (collectively, the "Technical Studies"), concerning ore reserves in the Hycroft Mine (study issued in 2006), concerning ore reserves in the Paredones Amarillos property (study completed in 2005), and concerning mineralized material contained in the Long Valley, Hasbrouck, Three Hills and Wildcat properties (studies completed in 2003), for Vista Gold Corp. (the "Company"), portions of which are summarized under the captions "Item 2. Properties — Hycroft Mine — Updated Feasibility Study"; "Item 2. Properties — Paredones Amarillos — Preliminary Feasibility Study"; "Item 2. Properties — Long Valley — Geology"; "Item 2. Properties — Hasbrouck — Geology"; "Item 2. Properties — Three Hills — Geology" and "Item 2. Properties — Wildcat — Geology" in this Annual Report on Form 10-K for the year ended December 31, 2005 (the "Form 10-K").

        We hereby consent to the incorporation by reference in the Registration Statements on Form S-3 (Nos. 333-91254, 333-102384, 333-104443, 333-120335 and 333-129720) and in the related Prospectuses, and in the Registration Statement on Form S-8 (No. 333-105621) of the Company of the summary information concerning the Technical Studies, including the reference to our firm included with such information, as set forth above in the Form 10-K.

MINE DEVELOPMENT ASSOCIATES
By:	/s/  NEIL PRENN Name:    Neil Prenn, P.E. Title:    President

Date: March 19, 2006

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Exhibit 23.4