Cougar Mountain Trail Run Series

Event overview

The Cougar Mountain Trail Run Series (June) is scheduled for Saturday, June 13, 2026, at Sky Country Trailhead, 7077 Clay Pit Rd, Bellevue, WA 98006. The event is organized by Seattle Running Club and Northwest Trail Runs. A portion of each entry fee is donated to King County Parks - $15 per entry. Races take place on single-track trails through Cougar Mountain Regional Wildland Park, featuring rolling hills, forested trails, wetlands, and a mix of short steep inclines and moderate climbs.

Distances

• 5K
• 8.2 Miles
• 14.5 Miles
• Short Series (pass covering June 8.2 with other short-series races)
• Long Series (pass covering June 14.5 with other long-series races)

Series format and policies

The series runs across multiple months with separate Short and Long Series options. Series awards are based on the best 3 of 4 races, with top overall Men, Women, and Nonbinary runners by cumulative time receiving awards and free entry to next year’s series. Individual event podium prizes are awarded to the top three in each gender category. Online registration has set open and close dates and day-of registration is available; there is a participant cap and no refunds. Safety and event policies include a health guideline to skip the race if ill, a cup-free initiative asking runners to carry refillable containers, a photo consent policy, and a prohibition on dogs on course due to insurance requirements. Visit the organization's website for the most recent information.