Carkeek 12 Hour
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Carkeek 12-Hour event
The Carkeek 12-Hour is an annual trail fundraiser held by Endless Trails at Carkeek Park in Seattle, Washington (950 North West Carkeek Park Road). The 2025 in-person event is scheduled for October 25, 2025. A separate virtual option runs October 1-31, 2025. The event is limited to 50 runners maximum. Registration is non-refundable and non-transferable; registration fees and donations support Endless Trails, a 501(c)(3) nonprofit that funds local trail work and education. The race director covers processing fees at checkout. Registration closes October 21, 2025.
- 12-hour event
- 6-hour event
Course, format, and other details
The course is a loop of 1.93 miles with 436 feet of elevation gain per lap. Terrain includes rolling trails and steep stairs, with views of the Puget Sound. The event emphasizes low-impact practices; organizers note there will be no paper products and local businesses supply much of the aid and prizes. Costumes are encouraged and costume prizes are awarded, including for pets in costume. Organizers may implement Covid precautions for communal areas as local conditions warrant. All proceeds after permit and aid costs are used for Endless Trails operating costs and trail projects. Visit the organization's website for the most recent information.