Dirty Dozen 12h Endurance Run

Race completed

not publishedn/a Distance

not publishedn/a 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.

38.0044° N, 122.2989° W © OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Field size ~48 Small. Long stretches with nobody in sight.

DUV results for the 2026 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, July

Daytime high 22°C

Night low 12°C

Rainfall Dry — rain unlikely

Daylight 14 h 39 m of light

Regional 2001-2020 average for July — NASA POWER, grid elevation 87 m. Not a forecast.

Results history

Year	Race	Finishers	Men's winner	Women's winner
2026	12h	48	Jeff Fleming · 100.310 km	Kathryn Meinhardt · 86.759 km
2025	12h	50	Samuel Cooper · 111.157 km	Zagdaa Baatar · 98.958 km
2024	12h	29	Samuel Cooper · 111.833 km	—
2023	12h	57	Alan Abbs · 118.624 km	Beverley Anderson-Abbs · 122.696 km
2022	12h	21	Casey Corman · 110.481 km	—
2019	12h	135	Shiran Kochavi · 102.354 km	Sandra Villines · 106.425 km
2018	12h	125	Timothy Mallen · 117.272 km	Natalia Skuba · 109.129 km
2017	12h	91	Selvin Henriquez · 125.705 km	Renate Kaufmann · 98.958 km
2016	12h	113	Michael Schooler · 108.839 km	Natalia Skuba · 101.855 km
2015	12h	111	Bryan Weathers · 112.332 km	Meredith Johnson · 105.347 km

The field has held steady: 50 in 2025, 48 in 2026. 54% of the 2026 field were women.

DUV results for the 2026 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.

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.