The elevation gain from the start line at Toutle to Elk Rock (27 miles into the ride, elevation 3,800 feet) is approximately 3,300 feet. From there, the highway descends 1,270 feet over five miles to Coldwater Lake (elevation 2,530 feet). Then riders will begin a nine-mile climb of approximately 1,780 feet to the Johnston Ridge viewpoint and turnaround. A rider going all the way to Johnston Ridge and back to Toutle will climb a total of 6,240 vertical feet over 82 miles (132K) including the climb back up the eastern side of Elk Rock.