Colorado River is a 105.28-mile out-and-back foot trail in Grand Canyon National Park, Arizona. It climbs 540 ft to a high point of 1,391 ft. Difficulty: very strenuous, from the NPS hiking-rating formula.
Open Colorado River on Trailbound's interactive map to see the full route, the elevation profile, today's forecast and any park alerts for Grand Canyon. Grand Canyon has permits or reservations for some areas: see the Grand Canyon page for what's needed.