Carkeek 12 Hour
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About the race
The Carkeek 12 Hour is a timed trail event held at Carkeek Park in Seattle, Washington, with both in-person and virtual options in 2026. The in-person event is scheduled for October 24; the virtual event runs October 1–31. The 2026 edition is the event's 20th annual running.
Distances offered
- 12-hour timed run
- 6-hour timed run
The course uses a 1.93 mile loop with approximately 436 feet of elevation gain per loop. Terrain includes rolling trails, steep stairs, and short flatter sections, with views of the Puget Sound. The race format emphasizes low-impact practices; organizers do not use paper products and prioritize local aid and raffle items from the Seattle area.
Field size is limited to 50 runners for Carkeek and related events. The event supports local trails: proceeds beyond permit fees and aid go to Endless Trails operating costs and trail-related causes. Race logistics are described as low-key and old-school: bibs are hand-made and laps are tracked with star stickers.
Costumes are encouraged, with prizes for individual, group, and pet costumes. The 6-hour option was added in 2014 to provide a shorter timed alternative on the same looped course. Visit the organization's website for the most recent information.
