Denali135

Denali135 : Paxson to Cantwell, Alaska

The Denali135 is a supported, point-to-point ultra running event held along most of the Denali Highway in Alaska. The course follows approximately 131 miles of the historic 135 mile Denali Highway, running from Paxson on the east side to Cantwell on the west side near the entrance to Denali National Park. The course listing gives an approximate total elevation gain of 8,800 feet.

The route is hard packed chip sealed and gravel for most of the distance. Notable course points include a paved section for the first 21 miles, Maclaren Summit Pass at 4,086 feet (mile 36.8), Maclaren River Lodge (mile 42), Alpine Creek Lodge (mile 68), the Susitna River Bridge (mile 79.5), and a return to pavement for the final two miles into Cantwell (mile 131.8). A pre-race briefing is held at Tangle Lake Lodge (mile 20).

Entry is limited; registration opens September 19, 2025, and closes May 1, 2026, or when the field reaches capacity. Applicants must have multiple prior ultras to qualify, including at least one 100 mile event or longer within the previous three years. The race allows one pacer at a time and requires each runner to have a support vehicle and crew. The maximum time to complete the course is 48 hours. Finishers within the time limit receive a commemorative belt buckle and an official finishers shirt. Lodging and vehicle rental options are available within 30 to 60 minutes of the start. Visit the organization's website for the most recent information.