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Carkeek 12 Hour 2026

24.10.2026Seattle (United States)
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133436 m D+ ft D+

3.1 km1.9 mi12HRlongest of 2 courses

At a glance

Carkeek 12 Hour 2026 took place on Saturday 24 October 2026 in Seattle (Washington, United States). One distance: 3.1 km.

Longest course: 12HR, 3.1 km with 133 m D+ (43 m per km: mountain terrain).

The 2027 edition is expected on Saturday 23 October 2027, date to be confirmed by the organiser. On Kliva, plan your pacing and nutrition for free, then send the plan to your watch.

A 12-hour or 6-hour timed loop race on a 1.93-mile course in Carkeek Park, Seattle, featuring 436 feet of elevation gain per loop and a festive Halloween atmosphere.
From the organiser

2 courses

  1. 3.1km1.9mi

    133 m D+436 ft D+

    avg 4%

    12HR
    No index

  2. 3.1km1.9mi

    133 m D+436 ft D+

    avg 4%

    6HR
    No index

GPX trace not yet published.

Race plan

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Start

Seattle (United States)

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