Tonahutu Creek-Flattop Junction is a 17.34-mile out-and-back foot trail in Rocky Mountain National Park, Colorado. It climbs 2,759 ft to a high point of 12,218 ft. Difficulty: very strenuous, from the NPS hiking-rating formula.
Open Tonahutu Creek-Flattop Junction on Trailbound's interactive map to see the full route, the elevation profile, today's forecast and any park alerts for Rocky Mountain. Rocky Mountain has permits or reservations for some areas: see the Rocky Mountain page for what's needed.