Lost Lake Trail is a hiking trail in Ontonagon County, Michigan. It is within Porcupine Mountains Wilderness State Park. It is 3.6 miles long and begins at 1,124 feet altitude. Traveling the entire trail is 7.2 miles with a total elevation gain of 1,158 feet. The Lost Creek Outpost Campground camp site is near the trailhead. The Lost Creek Yurt chalet can be seen along the trail.