Denali 50K

Event overview

The Denali50K is a new addition to the Denali Ultramarathons. The 2026 edition takes place on June 21, 2026. The race is limited to 50 runners and their crews and pacers. Registration opens September 19, 2025 and closes May 1, 2026 or when the field fills. Applicants must have completed at least three marathons in the previous two years, one of which was a trail marathon, or provide proof of sufficient training. Qualifying races must have been completed within the maximum time allotted.

Course and format

The course starts at Maclaren Summit at Mile 37 of the Denali Highway and finishes at Alpine Creek Lodge. The route descends toward the Maclaren River, passes thermokarst features, eskers and kettle lakes, and includes a single aid station at Mile 18 at Clearwater Creek Wayside. The race follows a crew-supported format; runners may also run without a crew if they pre-arrange pickup and use pre-positioned drop bags at the aid station. Pacers are allowed to join runners at the aid station. Bikes and dogs are not allowed during pacing.

Cutoffs, equipment and awards

Runners have a maximum of 9 hours to complete the course. Mandatory runner equipment includes a buff, sufficient water or hydration vest, at least 200 calories of energy items, and a visible bib. Pacers have similar equipment requirements. Finishers under 9 hours receive a finishers medal and shirt; there are overall awards for men and women. Visit the organization's website for the most recent information.