Cougar Mountain Trail Run Series (July)

Embark on an exhilarating trail adventure at the Cougar Mountain Trail Run Series (July) on July 11, 2026, located in the scenic Cougar Mountain Regional Wildland Park in Bellevue, WA. This popular event, a cornerstone of the vibrant Pacific Northwest trail running community, offers distances of 19.5M, 10.8M, and a 3.1M (5K), catering to a range of abilities. Typical race day conditions in July promise pleasant weather, with highs around 76°F and lows around 56°F, and only a 2% chance of precipitation, ensuring ideal running conditions.

The course itself is a highlight, leading runners through a lush forest adorned with fern-lined single-track trails, rolling hills, moderate climbs, and brief, steep inclines. The terrain offers a mix of narrow and technical sections with roots and rocks, as well as wider, groomed paths, providing a dynamic challenge. While major panoramic vistas are not the primary feature, the deeply forested environment creates a serene and immersive natural experience. The July event contributes to a legacy of over $265,000 raised for King County Parks, reflecting the race's commitment to supporting the very trails runners enjoy.

Runners appreciate the well-marked trails and the supportive atmosphere cultivated by the Seattle Running Club and Northwest Trail Runs, who have hosted this series for over two decades. Aid stations are strategically placed along the course, and in a commitment to sustainability, this is a cup-free event, so participants are encouraged to bring their own refillable hydration containers. The race begins and ends at the Sky Country Trailhead off 166th Way SE, providing a central hub for pre-race packet pickup and post-race camaraderie, complete with food and libations, including beer from Flying Lion Brewery. Whether you're aiming for a personal best on the challenging 19.5M, a solid effort on the 10.8M, or a swift 5K, the Cougar Mountain Trail Run Series promises a rewarding and memorable day on the trails.