The Cougar Mountain Trail Run Series offers a challenging and scenic journey through one of Seattle's most beloved training grounds. Runners navigate a lush forest environment featuring fern-lined single-track trails, rolling hills, and diverse wetland habitats. This 22nd annual series is designed to build endurance, making it an ideal training supplement for fall marathons and ultras. With distances ranging from 5K to 50K, the event caters to all experience levels while fostering a strong sense of community. Beyond the trails, participants contribute to a meaningful legacy, as a portion of ev...
Not affiliated with this event. Official website. We may earn a commission on registrations.













































Sky Country Trailhead
Bellevue, WA 98006