Seattle, WA, United States · Saturday, October 24, 2026

Timed 12 hours

Carkeek 12 Hour

24 days to go

not publishedn/a Distance

131 m Climbing

not publishedn/a Grit

We hold no course length for this race — a timed or backyard event is measured by the clock, not the kilometre — so there is no Grit score to give you.

47.6062° N, 122.3321° W © OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Field size ~15 Tiny. You will run alone for most of it.

DUV results for the 2025 edition (12h) — ranked runners only. Starters are not published, so the field was at least this big and no finish rate can be given.

Typical conditions, October

Daytime high 15°C

Night low 7°C

Rainfall Showers likely

Daylight 10 h 27 m of light

Regional 2001-2020 average for October — NASA POWER, grid elevation 110 m. Not a forecast.

Results history

Year	Race	Finishers	Men's winner	Women's winner
2025	12h	15	Scott Wegner · 86.470 km	Carly Silvernale · 86.470 km
2024	12h	8	Kenneth Leonard · 86.968 km	Carly Silvernale · 75.413 km
2023	12h	15	Dan Sloat · 88.707 km	Laura Larson · 83.364 km
2022	12h	7	Richard Cook · 93.181 km	Meredith Mosman · 80.756 km
2019	12h	17	Patrick Burpee · 91.813 km	Allison Moore · 85.601 km
2018	12h	15	Bryan Estes · 97.156 km	Rachel Entrekin · 96.689 km
2017	12h	16	Sam Settelmeyer · 105.106 km	Rachel Entrekin · 88.707 km
2016	12h	17	Kevin Friedrich · 87.837 km	Ellen Bayer · 77.151 km
2015	12h	16	Alex Swenson · 95.788 km	Lia Sterciuc · 70.070 km
2014	12h	24	Alex Swenson · 98.025 km	Kay Allen · 78.519 km

The field grew 88% between 2024 (8) and 2025 (15). 40% of the 2025 field were women.

DUV results for the 2025 edition (12h) — ranked runners only. Starters are not published, so the field was at least this big and no finish rate can be given.

The Aid Station

Course-specific beta from the community

👟 gear

With trail terrain, choose a shoe with moderate cushioning for optimal performance.

By UltraHub Expert

Gear for this race

Chosen for this trail race with 131 m of ascent.

Trail Running Shoes Cushioning on trail that is still there in the last quarter.
Race Nutrition Self-supported fuelling between aid stations.
Hydration Vests Flask capacity without the bounce.
Headlamps A 12 h limit puts you out there after dark.
GPS Watches Battery life first — an ultra outlasts most full-GPS modes.

Altra

Olympus 6

Zero-drop max-cushion trail shoe with wide toe box for ultra distances.

$170 ★★★★★ 4.6

Adidas

Terrex Speed Ultra

RunRepeat found the Adidas Terrex Speed Ultra to have a grippy outsole and great lockdown, while iRunFar noted that the shoe works on a variety of trail conditi…

★★★★★ 4.5

Tailwind