Carkeek 12 Hour
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Event overview
The Carkeek 12 Hour is scheduled as an in-person race on October 24, 2026, at North West Carkeek Park, 950 North West Carkeek Park Road, Seattle, WA. The event offers 12-hour and 6-hour timed options and also lists a separate virtual registration option for 2026. Registration closes on Wednesday, October 21, 2026 at 11:59 PM PT. This edition marks the event's twentieth year.
Course and other information
The course is described as a looped trail with a 1.93-mile loop and an additional short loop listed as a "0-54-mile short loop." Organizers note the route includes substantial elevation gain, often in the form of stairs, and that fall weather on race day can be unpredictable. Costumes are encouraged and prizes are awarded for best costumes; pets in costumes are also supported and may receive prizes. The race operates as a fundraiser for Endless Trails, a 501(c)(3) nonprofit; registration fees and donations not used for prizes are directed to trail work, trail education, and trail advocacy in the Northwest. Registrations are non-refundable and non-transferable. A year-long run club competition was added in 2026 so registered participants can report club affiliation and contribute miles to a club tally. Visit the organization's website for the most recent information.
