About This Race

The Plain 100 Endurance Runs are a uniquely self-supported ultramarathon held near the town of Plain in Eastern Washington, featuring no aid stations, no course markings, and no pacers — runners navigate entirely on their own. The race offers a 100-mile (two-loop) and a 100K (one-loop) option, with the only crew/drop bag access permitted at Deep Creek between loops.

Key Dates

Race Day

Sep 19, 2026

13d

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