Klondex Announces New Open Pit Mineral Resource Estimate at Fire Creek; Total Indicated of 1.1M AuEq Oz and Inferred of 1.1M AuEq Oz

Klondex Mines Ltd.

VANCOUVER, BC--(Marketwired - December 21, 2017) - Klondex Mines Ltd. (TSX: KDX)(NYSE American: KLDX) ("Klondex" or the "Company") is pleased to provide an initial open pit Mineral Resource estimate for its Fire Creek mine ("Fire Creek") located in northern Nevada, USA, which incorporates the results from the 2017 open pit surface and underground exploration drill programs. This Mineral Resource estimate is in addition to the Company's previously announced underground Mineral Resources. Klondex plans to provide a complete Mineral Reserve and Resource update, for all sites, during the first quarter of 2018.