Denison Announces 2018 Exploration & Evaluation Program Focused on High Priority Properties

TORONTO, ONTARIO--(Marketwired - Jan. 17, 2018) - Denison Mines Corp. ("Denison" or the "Company") (TSX:DML)(NYSE MKT:DNN)(NYSE American:DNN) is pleased to announce the details of its CAD$16.7 million (Denison's share) exploration and evaluation budget for 2018. The budget will be mainly focused on the Company's high priority projects, namely Wheeler River, Waterbury Lake and Hook-Carter, each of which are located in the Athabasca Basin in northern Saskatchewan. Winter drilling has commenced at Wheeler River and winter drilling programs are expected to start at Waterbury Lake this week and at Hook-Carter in February.

To view Figure 1: Denison's Athabasca property portfolio as of December 31^st, 2017, please visit the following link: http://media3.marketwire.com/docs/1106712-Figure-1.pdf

Budget highlights for 2018 include:

• Wheeler River Project - A diamond drilling program of approximately 45,000 metres in 60 drill holes is planned with a focus on exploration drilling along strike of the Gryphon deposit and at other high priority, and largely untested, regional targets on the property. Concurrent with the diamond drilling program, a Pre-Feasibility Study ("PFS") is scheduled for completion in 2018, which will be based on an updated mineral resource estimate for the project (expected in Q1 2018, see Denison's press release dated January 4, 2018).
  
  
• Waterbury Lake Project - Exploration efforts in 2018 will follow-up on the highly successful drilling completed in 2017, which resulted in the discovery of the Huskie Zone of high-grade, basement-hosted uranium mineralization (see Denison's press release dated October 11, 2017). Approximately 14,400 metres of diamond drilling is planned in 36 drill holes.
  
  
• Hook-Carter Project - Numerous priority targets have been generated along the prolific Patterson Corridor from ground geophysical surveying completed in 2017. An inaugural diamond drilling program of approximately 10,000 metres in 17 drill holes is planned.
  
  

David Cates, President and CEO of Denison commented, "The 2018 budget aligns with our strategy to focus our exploration spending on select high-priority projects. Our winter drilling programs at Wheeler and Waterbury will commence with drill step-outs from high-grade, basement hosted mineralization that remains open. In addition, our exploration team is excited to commence our maiden drilling campaign on the Patterson Corridor at Hook-Carter. We look forward to another year of active exploration on a range of exciting opportunities on the Company's Athabasca-focused exploration portfolio."