The 2018 wildfire season in Montana began around June, 2018. The Highway 37 Fire is a fire above Montana Highway 37 west of Libby, Montana at , near a Superfund site which is a former vermiculite mine. It was spotted on July 19. Firefighters needed to wear respirators to protect themselves from exposure to asbestos mixed with duff and bark by mining operations and mobilized by the fire. The Reynolds Lake Fire, caused by lightning on July 17, straddles the Bitterroot National Forest and Salmon-Challis National Forest southwest of Darby, Montana at . It reached over in extent by July 22. References Wildfires Wildfires in Montana Lincoln County, Montana