12 miles6 milesComing SoonEndless Trails50 spots
Carkeek 12 Hour
Seattle, Washington
$75
6HR Standard (In-Person, after May 31)
48
Days Away
About This Race
The Carkeek 12-Hour (and 6-Hour) is a timed loop race held at Carkeek Park in Seattle, WA, featuring a 1.93-mile loop with 436 feet of elevation gain per loop. Now in its 20th year, it is known as one of the toughest 12-hour races around, with Halloween costumes encouraged and prizes awarded.
Key Dates
Registration Closes
Invalid Date
Race Day
Oct 24, 2026
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Pricing
Current Price
$75
6HR Standard (In-Person, after May 31)
Price Progression
6HR Standard (In-Person, after May 31)
$75Jun 1, 2026
12HR Standard (In-Person, after May 31)
$80Jun 1, 2026
6HR Early Bird (In-Person)
$50
12HR Early Bird (In-Person)
$60
6HR Virtual
$35
12HR Virtual
$35
Race Planning
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