Silver Creek Trail Run Half Marathon

Run With The Kokanee is scheduled for Saturday, October 18, 2025, at Lake Sammamish State Park in Issaquah, WA. The event offers the following distances: 5k 10k (two laps of the 5k loop) Entry fees vary by registration period, online pre-registration closes on October 16, and day-of registration..

The West Seattle Monster Dash is an annual costumed 5K trail run/walk held at Lincoln Park in Seattle, WA. The 14th edition takes place in October 2025 and features a 5K Run/Walk, a Kids Monster Dash for children 12 and under, and a "Just a Shirt!" option. Participants receive a t-shirt with the ico..

The Carkeek 12-Hour is scheduled as an in-person event on October 25, 2025, with a virtual option available October 1-31, 2025. The event takes place at Carkeek Park in Seattle, Washington (950 North West Carkeek Park Road). Registration is capped for this event series at 50 runners. Proceeds and d..

The Cougar Mountain Trail Run is held at King County’s Cougar Mountain Regional Wildland Park with the event center at Sky Country Trailhead in Bellevue, WA. The October race is part of the Cougar Mountain Trail Run Series, organized by Seattle Running Club and Northwest Trail Runs. A portion of ea..

The event takes place on Saturday, November 1, 2025, at Carkeek Park in Seattle, Washington. Distances offered: 5k 10k The run is part of the 2025-26 Winter Trail Series. The course starts and finishes in the Lower Meadow next to Piper’s Creek. The route is mostly in forest (about 85%) with a mi..

Grand Ridge Trail Run, held at Grand Ridge Park near Issaquah, Washington, is the season finale of Evergreen Trail Runs. The event offers multiple distances: 5 Mile, Half Marathon, Marathon, 50K, 5M Brunch Run, and a Kid's Race. The course uses two distinct loops: a 5-mile loop and a Half-Marathon l..