Distance, round trip: 8 miles

Estimated Time: 5-6 hours

Difficulty: strenuous

Trailhead: 5 miles south of Mammoth on the Mammoth-Norris Road, across from the Glen Creek trailhead

Follow Bunsen Peak Road (hiking/biking only) through grassland and burned forest 2.5 miles to Osprey Falls Trail (no bikes allowed). Descend 700 feet into Sheepeater Canyon, one of the deepest canyons in Yellowstone. Osprey Falls, on the Gardner River, plunges 150 feet over the edge of a lava flow.

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