Carkeek 6 & 12 Hour
Race facts
- Start time
- 7:00 AM (12HR), 9:00 AM (6HR)
- Distances
- 6 Hour, 12 Hour
- Terrain
- Trail, hilly
- Organizer
- Endless Trails
- Registration
- Closed
From the official race website, checked 2026-10-23. Official page
External Event
Distance
6.2 mi
Pace
All paces
Terrain
Trail, hilly
Difficulty
Challenging
About this run
The Carkeek 6 & 12 Hour is an endurance event held in Seattle, Washington, on Saturday, October 24, 2026. This race is known for its challenging nature, featuring significant elevation gain, often in the form of stairs, and unpredictable fall weather. Runners can choose to participate in either a 6-hour or a 12-hour event, completing laps on a 1.93-mile loop or a shorter, more demanding 0.54-mile loop. The event encourages a fun, spooky atmosphere with costumes for runners and pets, offering prizes for the best costumes. It also serves as a fundraiser for Endless Trails, a 501(c)3 non-profit organization dedicated to supporting trail work, education, and advocacy in the Northwest region, with funds often directed back to Carkeek Park trails. New for 2026, a run club competition has been introduced, where participants' miles contribute to their club's annual tally for a chance to win a trophy. The race emphasizes personal challenge and community spirit, making it a unique way to celebrate Halloween weekend.
Who it's for
This event is suited for experienced ultra-runners and those looking to test their endurance over extended periods, particularly those who enjoy challenging, hilly terrain and a unique, festive atmosphere.
What to expect
- Arrive with ample time before your chosen start time (7:00 AM for 12-hour, 9:00 AM for 6-hour) to allow for parking and preparation.
- Be prepared for a challenging course with significant elevation changes, including stairs, and potentially wet or cool weather typical of Seattle in late October.
- The event encourages costumes, so consider dressing up for a chance to win prizes and add to the festive Halloween spirit.
- Familiarize yourself with the 1.93-mile loop and the optional 0.54-mile short loop to strategize your race.
- Hydration and nutrition will be key for extended time on your feet; plan accordingly for self-sufficiency or utilize any available aid stations.
- Check the official registration page for the most current information on packet pickup, course details, and any last-minute updates.
Good to know
- The event is a fundraiser for Endless Trails, a non-profit supporting local trails.
- Costumes are highly encouraged for both human participants and pets.
- Registration fees and donations support trail maintenance and advocacy.
- Runners can opt to make an additional donation to Endless Trails during registration.
Typical conditions
For events around October 2026 in Seattle, United States: Typical autumn conditions in this region — conditions can change quickly; confirm race-day guidance on the official page.
How to prepare
Trail events reward time on uneven surfaces and hills. Practice footing and bring the shoes and hydration the organizer recommends — details vary by race.
Find races near youGetting there
This event is listed in Seattle, United States. Confirm the exact start venue, parking, and transit options on the official registration page.
Frequently asked questions
What is the date of the Carkeek 6 & 12 Hour?+
The event is scheduled for Saturday, October 24, 2026.
What distances are offered?+
Participants can choose between a 6-hour or a 12-hour event.
Where is the race located?+
The race takes place at Carkeek Park in Seattle, WA.
What is the terrain like?+
The course features a 1.93-mile loop with significant elevation gain, including stairs, and an optional shorter, more challenging 0.54-mile loop.
Is this event a fundraiser?+
Yes, the Carkeek 6 & 12 Hour is a fundraiser for Endless Trails, a non-profit supporting local trails.
Are costumes encouraged?+
Yes, costumes are strongly encouraged for runners and pets, with prizes awarded for the best costumes.
When does registration close?+
Registration closes on Wednesday, October 21, 2026, at 11:59 PM.
How can I register?+
You can register for the event through the official registration page on UltraSignup: https://ultrasignup.com/register.aspx?did=133213
Registration is handled by the official event organizer
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