Saturday, October 31 · Bellevue, WA
Cougar Mountain Trail Run Series (October)
Welcome to the 2025 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 a portion of every entry going to KC Parks. OCTOBER'S RACE ONLY - COSTUME CONTEST/CHALLENGE: The October Cougar Mountain races fall a few days before…
Start line: Sky Country Trailhead
Register →49 days to race day
Also on Let's Do This
Train for it with a crew
Training is easier with people who run your pace all season. Run clubs in Seattle →
Frequently asked
- When is the Cougar Mountain Trail Run Series (October)?
- The next Cougar Mountain Trail Run Series (October) is Saturday, October 31 in Bellevue, WA.
- Where does the Cougar Mountain Trail Run Series (October) start?
- The Cougar Mountain Trail Run Series (October) starts at Sky Country Trailhead in Bellevue, WA.
- How do I register for the Cougar Mountain Trail Run Series (October)?
- You can register for the Cougar Mountain Trail Run Series (October) on RunSignup and Let's Do This. Use the Register link above; RunVibe does not sell registrations directly.
Listed on RunSignup and Let's Do This. Race details are the organiser’s — confirm the date and start time with them before you travel.