Trail Ridge Road is the second longest climb in the U.S., and one of the most difficult climbs in Colorado, with 11 miles above the treeline and a high point that tops out at 12,151 ft.
Trail Ridge Road is the second longest climb in the U.S., and one of the most difficult climbs in Colorado, with 11 miles above the treeline and a high point that tops out at 12,151 ft. The climb’s average grade is 4.1% with the steepest mile at 9.8%.