The Mann Gulch fire was a wildfire reported on August 5, 1949, in a gulch located along the upper Missouri River in the Gates of the Mountains Wilderness (then known as the Gates of the Mountains Wild Area), Helena National Forest, in the U.S. state of Montana. A team of 15 smokejumpers parachuted into the area on the afternoon of August 5, 1949, to fight the fire, rendezvousing with a former smokejumper who was employed as a fire guard at the nearby campground. As the team approached the fire to begin fighting it, unexpected high winds caused the fire to suddenly expand, cutting off the men's route and forcing them back uphill. During the next few minutes, a blow-up of the fire covered in ten minutes, claiming the lives of 13 firefighters, including 12 of the smokejumpers. Only three of the smokejumpers survived. The fire would continue for five more days before being controlled.