The Dirt Circuit - 12 Hour Endurance Trail Runs

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.

36.2140° N, 83.2949° W © OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Field size ~28 Small. Long stretches with nobody in sight.

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, September

Daytime high 27°C

Night low 14°C

Rainfall Showers likely

Daylight 12 h 19 m of light

Regional 2001-2020 average for September — NASA POWER, grid elevation 590 m. Not a forecast.

Results history

Year	Race	Finishers	Men's winner	Women's winner
2025	12h	28	Zachary English · 107.343 km	Audrey Carter · 112.010 km
2024	12h	23	Caleb Mathewson · 84.009 km	Audrey Carter · 102.676 km
2023	12h	16	Emmanuel Estrada · 93.341 km	Brittany McCarthy · 79.340 km
2022	12h	26	David Compton · 103.641 km	Audrey Carter · 85.617 km
2021	12h	18	Joel Bradbury · 76.604 km	Grace Daniel · 81.110 km
2020	12h	21	Matthew Neuharth · 95.595 km	Amy Costa · 81.255 km
2019	12h	14	George Hambrick · 91.732 km	Jaime Drown · 91.732 km
2018	12h	10	Jason Tipton · 90.203 km	Amanda Tipton · 80.708 km
2017	12h	15	Steve Cate · 80.708 km	Hannah Wolters · 113.941 km
2016	12h	17	Steven Kuhn · 80.708 km	Glynetta Vogt · 80.708 km

The field grew 22% between 2024 (23) and 2025 (28). 39% 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.

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.

Salomon

Ultra Glide 4

$159.95 ★★★★★ 4.6

Adidas

Terrex Agravic Speed Ultra

RunRepeat found the Adidas Terrex Agravic Speed Ultra to be perfect for midfoot and forefoot strikers, while iRunFar noted that the shoe feels incredibly effici…

★★★★★ 4.5

Tailwind