Denison Mines Corp. Second Quarter 2011 Results: Conference Call Friday, August 5, 2011

TORONTO, ONTARIO -- (Marketwire) -- 07/07/11 -- Denison Mines Corp. (TSX: DML)(NYSE Amex: DNN) ('Denison' or the 'Company') announces that the Company will hold a telephone conference with a webcast presentation at 9:00 am EDT on Friday, August 5, 2011 to discuss financial results for the Second Quarter 2011.

Please call in 5-10 minutes before the conference starts and stay on the line (an operator will be available to assist you). The call-in number is (416) 340-8018.

To view the live presentation, please log on at www.denisonmines.com 10 minutes prior to the call.

Approximately two hours after the call:

--  a replay of the telephone conference will be available at 905-694-9451
    and the passcode is 2461552; and
--  the presentation will be available at www.denisonmines.com.

About Denison

Denison Mines Corp. is an intermediate uranium producer with production in the U.S., combined with a diversified development portfolio of projects in the U.S., Canada, Zambia and Mongolia. Denison's assets include its 100% ownership of the White Mesa mill in Utah and its 22.5% ownership of the McClean Lake mill in Saskatchewan. The Company also produces vanadium as a co-product from some of its mines in Colorado and Utah. Denison owns interests in world-class exploration projects in the Athabasca Basin in Saskatchewan, including its flagship project at Wheeler River, and in the southwestern United States, Mongolia and Zambia. Denison is the manager of Uranium Participation Corporation (TSX-U), a publicly traded company which invests in uranium in concentrates and uranium hexafluoride.

Contacts:

Denison Mines Corp.

Ron Hochstein

President and Chief Executive Officer

(416) 979-1991 ext. 232


Denison Mines Corp.

James Anderson

Executive Vice President & Chief Financial Officer

(416) 979-1991 ext. 372