Plain Endurance Runs

SEP
19
2026
Trail ultramarathon in Leavenworth WA offering self supported 100K and a qualifying 100 mile over remote, high elevation USFS terrain.
Sat 19 Sep 2026
100 miles 100 kilometers

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Plain Endurance Runs

Plain Endurance Runs is an ultramarathon event near Leavenworth, WA. The event includes the following distances:

  • Plain 100K
  • Plain 100 Mile

Races run on U.S. Forest Service trails and forest roads in the Cascade Mountains across the Lake Wenatchee, Entiat, and Chelan ranger districts. The course uses about 85 miles of trail and 20 miles of forest service road and is remote. Elevation gain and loss for the full course is roughly 21,000 feet. The event is self supported with one resupply point available after the first 100K. Water on course comes from creeks and rivers, and participants must carry all food and required gear from the start or from the resupply point.

Qualification rules differ by distance. The Plain 100 Mile requires prior completion of a TRAIL 100 mile or the Plain 100K, or an equivalent event that demands significant self support and many hours on foot. The Plain 100K has no formal qualification requirement, though a challenging 50 mile race is noted as a minimum level of ability.

The event is organized as a non profit and proceeds support local Search and Rescue and military veteran support groups. Refunds are not issued unless the event is cancelled; if cancelled, some funds will be withheld to cover direct expenses. Special circumstances may be considered. Visit the organization's website for the most recent information.

100 mi
Plain 100 Miler
100 km
Plain 100k
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