Cougar Mountain Fall Trail Run
October 25, 2026 @ 8:00 am - 5:00 pm
Hosted by Seattle Running Club and Northwest Trail Runs, the Cougar Mountain Trail Series supports King County Parks. The Cougar Mountain courses gradually get longer throughout the series. Run through a lush forest of fern-lined single-track trails.
October Event
5K, 7.6 Mile Cross Country, 19.5 Miles & 50K
50K and 19.5 start at 8 AM (early start option for 50K only at 7), 7.6 starts at 9 AM, 5K at AM 9:30, cut off is 5 PM; ~17:25/mile for 50K, ~19:30/mile for early start
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