West Seattle Monster Dash

Running Up For Air - Tiger Mountain is an endurance running event taking place in Issaquah, Washington, designed to raise awareness about air quality issues. Participants can choose from various challenges, including 12-hour, 6-hour, and 3-hour races, all set against the stunning backdrop of Tiger M..

The Mt Si Relay & Trail Runs is a popular running event taking place on May 4, 2025, in Snoqualmie, WA. This event features various race distances, including a 50-mile ultra, 50K, marathon, and half marathon, catering to both novice and experienced runners. The course primarily follows the scenic Sn..

The Tiger Claw is a challenging trail running event held in Issaquah, Washington, on May 9-10, 2025. It features multiple race options, including the 50k, the Ascent, and the Big Cat, with the latter combining both the ascent and 50k races. The course traverses rugged Pacific Northwest terrain on Ti..

The Cougar Mountain Trail Run Series, organized by the Seattle Running Club and Northwest Trail Runs, takes place in King County's Cougar Mountain Regional Wildland Park. The event features various distances, including 5.1 miles and 10.8 miles, with additional series options throughout the summer. P..

The Trillium Trail Run, organized by the Bainbridge Island Parks & Trails Foundation, is a premier spring running event taking place at Battle Point Park. Participants can choose from a scenic 10K or 5K trail run, as well as a Kids Fun Run, all set amidst the beautiful wooded landscapes of Bainbridg..

The Dirty Turtle 25/50K is a challenging trail running event scheduled for May 17, 2025, at Green Mountain Horse Camp in Bremerton, WA. The course features 75% singletrack trails and 25% dirt/gravel roads, with 50K runners facing 7,000-8,000 feet of elevation gain on rugged terrain. Both distances o..