Cougar Mountain Trail Run Series - July 11, 2026
Welcome to the 2026 edition of the Cougar Mountain Trail Run Series, put on by Seattle Running Club and Northwest Trail Runs. Our events support King County Parks, with $15 of every entry going to KC Parks.
July 11 Race Details:
- Courses: 5K, 10.8 Miles, 19.5 Miles
- Start Time: 9 AM
- Cut-off Time: 2:30 PM
This series is a great way to support local parks and enjoy the beautiful trails of Cougar Mountain Regional Wildland Park, located just 15 minutes from Seattle. The courses feature rolling hills, moderate climbs, and lush forests with fern-lined single-track trails.
Series Awards & Information:
Awards are given for the top 3 overall Man, Woman, and Nonbinary runners. Series standings are updated after each race, and eligibility for awards is based on the best 3 out of 4 races.
Important Notes:
- Online registration closes the Wednesday before each event. Day-of registration may be available.
- There are NO REFUNDS.
- Dogs are not allowed on the course due to insurance requirements.
- The event is cup-free; please bring your own refillable water container.
The Cougar Mountain Trail Run Series has raised over $265,000+ for King County Parks and contributed hundreds of hours of trail work. Join us for the 22nd annual event!