EXHIBIT 99.13

SLR Consulting (Canada) Ltd 55 University Avenue, Suite 501,Toronto, ON M5J 2H7

CONSENT

Ladies and Gentlemen:

The undersigned hereby consents to (1) the references to the undersigned’s name included or incorporated by reference in the Annual Report on Form 40-F of Denison Mines Corp. and the registration statement on Form F-10 (File No. 333-258939) of Denison Mines Corp. (the “Registration Statement”) in connection with (a) the report entitled “Technical Report on the Denison Mines Inc. Uranium Properties, Saskatchewan, Canada” dated November 21, 2005, as amended on February 16, 2006, (b) the report entitled “Technical Report on the McClean North Uranium Deposit Mineral Resource Estimate, Saskatchewan, Canada” dated January 31, 2007, (c) the report entitled “Technical Report on the Sue D Uranium Deposit Mineral Resource Estimate, Saskatchewan, Canada” dated March 31, 2006, and (2) all other references to the undersigned included or incorporated by reference in the Annual Report on Form 40-F of Denison Mines Corp. and the Registration Statement and to the inclusion and incorporation by reference of the information derived from the Technical Report in the Annual Report on Form 40-F and the Registration Statement.

Dated: March 25, 2022

(Signed) Richard E. Routledge

Richard E. Routledge, M.Sc., P.Geo.

Associate Principal Geologist

SLR Consulting (Canada) Ltd.

(formerly Roscoe Postle Associates Inc.)

  

www.slrconsulting.com