White Mountains 100

White Mountains 100 is a 100-mile ultramarathon based in Fairbanks, Alaska, on April 4, 2027. There is a single format, the 100 Miler (160.9 km), run in the White Mountains. With no shorter option on the schedule, this is an event for runners who already know what a long day, and a long night, on remote terrain feels like.

A hundred miles in the Alaskan backcountry is a self-management exercise as much as a running one: pacing, fuelling, feet, and gear all matter more than raw speed. Build toward it over several months with a big weekly long run, back-to-back weekend efforts, and time spent moving on rough ground rather than pavement. Rehearse your nutrition plan at race effort, practice changing socks and layers quickly, and set a conservative early pace, because the finish is decided far more by what you have left after mile 60 than by how fast you cover the first 20.