Trillium Trail Run

The Cottontail 6 & 12 Hour event, taking place in Seattle's Carkeek Park, offers participants a unique running experience on a scenic 1.93-mile loop. Scheduled for April 12, 2025, this event allows runners to choose between a 6-hour or 12-hour challenge, with the option to complete as many laps as t..

The Squak Mountain Trail Run is an exciting running event held at Squak Mountain State Park near Issaquah, Washington. Participants can choose from various distances, including a 12K, half marathon, and 50K, all featuring well-maintained trails and stunning views of the surrounding mountains. The ev..

Last Fool Standing is an exciting annual running event taking place in Poulsbo, WA, featuring various endurance formats over a weekend. Participants can choose from a 48-hour endurance challenge, a 24-hour event, or 12-hour sessions, all set on a scenic 5K+ trail loop in the lush Pacific Northwest f..

Tiger Claw is an exhilarating trail running event taking place in Issaquah, WA, featuring challenging courses that test the limits of even the most seasoned runners. Participants can choose from three different climbs and a common descent, with the option to complete the 50k or the more demanding 50..

The Cougar Mountain Trail Run Series, organized by the Seattle Running Club and Northwest Trail Runs, features a variety of trail running events in King County's Cougar Mountain Regional Wildland Park. Scheduled for May 10, 2025, participants can choose between a 5.1-mile and a 10.8-mile race. This..

The Dirty Turtle 25/50K is an exciting trail running event set in Bremerton, WA, featuring challenging courses that include 75% singletrack and 25% dirt/gravel service roads. Participants can choose between a 25K or 50K distance, with the latter offering a demanding elevation gain of 7,000 to 8,000..