Denali 100K
Always double-check with the organizer's website! This page may contain affiliate links.
Denali 100K
Denali 100K is a point to point ultramarathon held along the historic Denali Highway in Alaska on June 21, 2026. The race is limited to 50 runners and their support crews and pacers. Runners must complete the course within a maximum of 18 hours.
The course starts near Alpine Creek Lodge at about mile 68 and heads west to a finish near Cantwell outside Denali National Park. The route reaches the Susitna River Bridge at mile 79.5. After that point there are no services or lodging for roughly the next 50 miles, so planning for fuel, water, and logistics is required. Weather permitting, Denali and surrounding ranges are visible from sections of the highway. Summer daylight is extended during the event.
Each runner must be accompanied by a support vehicle and crew. One pacer at a time may run with a competitor, and no single pacer may run more than 30 miles with their runner; pacers may assist with crewing duties and driving. To qualify, applicants must have completed at least one 50K and two marathons in the previous two years or provide evidence of equivalent training; qualifying races must have been completed within their maximum allotted times.
Registration opens September 19, 2025 and closes May 1, 2026 or when 50 runners have registered. Acceptance requires submission of qualifying race information; accepted runners will receive an information package. There are no registration refunds though deferments may be offered at the race director's discretion.
Mandatory runner equipment includes a Spot GPS tracker or Garmin InReach, a buff, sufficient water or a hydration vest, at least 500 calories of energy on hand, a high visibility reflective vest and flashing blinker from dusk to dawn, and a visible bib. Pacers have similar equipment requirements. Runners who finish within 18 hours receive a Denali100K belt buckle and finishers shirt; there are also overall awards for men and women. A portion of registration fees supports the Denali Education Center. Visit the organization's website for the most recent information.