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Carkeek 12 Hour

Seattle, United States • 25 Oct 2025

The Carkeek 12-Hour is a challenging trail running event held annually at Carkeek Park in Seattle, Washington. Celebrating its 19th edition in 2025, the race offers both 12-hour and 6-hour options on a 1.93-mile loop course featuring 436 feet of elevation gain per lap, including rolling trails and steep stairs with scenic views of Puget Sound. Known as one of the toughest 12-hour races, it embraces a fun, festive atmosphere with encouraged Halloween costumes and prizes for best dressed runners and pets. The event supports local trails through Endless Trails, a nonprofit, with all proceeds aiding trail maintenance and advocacy in the Northwest. Visit the organization's website for the most recent information.

United States Washington Seattle

Race information

Website Registration
12 hr
12hr
6 hr
6hr
Visit the organization's website for the most recent information.
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