Carkeek 12 Hour
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About the race
Carkeek 12-Hour is an annual trail event organized by Endless Trails, a Northwest 501(c)(3) nonprofit. The 2026 edition is the 20th annual event and offers both an in-person race and a virtual option in October: the virtual event runs October 1–31 and the in-person event takes place October 24, 2026.
Distances:
- 12-hour timed loop run
- 6-hour timed loop run option
The course is a single 1.93 mile loop with varied terrain, including rolling trails, steep stairs, and a few flatter sections, and it passes areas with views of the Puget Sound and fall canopy. Each loop records about 436 feet of elevation gain. The event limits entries to 50 runners to reduce footprint and preserve a low-key atmosphere.
This event supports local trails: proceeds beyond permit and aid costs go to Endless Trails operating expenses and local trail projects. Race operations emphasize low environmental impact, with no paper products used at the event and aid and raffle items largely sourced from local Seattle-area businesses. Race logistics are old-school in approach—bibs are handmade and laps are tracked with star stickers. The event includes costume running elements tied to Halloween weekend, with prizes for costumed runners, pets, and groups, and occasional random prizes during the day. Visit the organization's website for the most recent information.
