Denison Reports 25 Metres of 1.3% eU3O8 as Gryphon Exploration Continues at Wheeler River

TORONTO, ONTARIO--(Marketwired - July 24, 2017) - Denison Mines Corp. ("Denison" or the "Company") (TSX:DML)(NYSE MKT:DNN) is pleased to report that multiple high-grade intervals of uranium mineralization have been returned from the initial drill holes completed during the summer 2017 drilling program on the Company's 60% owned Wheeler River project. The summer 2017 drilling program is focused on the delineation and expansion of the Gryphon deposit and, to date, has been successful on multiple fronts including expansion of mineralization within the A, B and D series of lenses.