Fern Lake Trail is a 7.24-mile out-and-back foot trail in Yellowstone National Park, Wyoming. It climbs 672 ft to a high point of 8,880 ft. Difficulty: moderate, from the NPS hiking-rating formula.
Open Fern Lake Trail on Trailbound's interactive map to see the full route, the elevation profile, today's forecast and any park alerts for Yellowstone. Yellowstone has permits or reservations for some areas: see the Yellowstone page for what's needed.