The hike to Lost Lake is located in the Custer Gallatin National Forest very close to Red Lodge, Montana. The paved trailhead with pit toilet, marked on AllTrails, is no longer the starting point. The flood from a year ago has washed out the bridge, and it is difficult to cross the creek that feels more like a river at this location. As a result, the once 10-mile hike is now 13 miles.
HAPPY HIKING!