Howard Aslinger 12 Hour Endurance Run

120 days away

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.

37.3059° N, 89.5182° W © OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Field size ~29 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, March

Daytime high 14°C

Night low 2°C

Rainfall Showers likely

Daylight 11 h 46 m of light

Regional 2001-2020 average for March — NASA POWER, grid elevation 143 m. Not a forecast.

Results history

Year	Race	Finishers	Men's winner	Women's winner
2026	12h	29	William Montgomery · 103.625 km	Laura Sheridan · 122.680 km
2025	12h	27	Jim Seymour · 116.725 km	Jennifer Metcalf · 98.524 km
2024	12h	30	Travis Redden · 107.826 km	Angela Moses · 96.866 km
2023	12h	28	Patrick Zamudio · 88.626 km	Renee Darnstaedt · 89.624 km
2022	12h	35	Matthew Hertell · 92.826 km	Jessy Beard · 102.756 km
2021	12h	34	James Pratt · 111.366 km	Erin Boss · 107.937 km
2019	12h	37	Chris Freels · 101.179 km	Rita Short · 90.557 km
2018	12h	27	James Lambert · 95.369 km	Denise Bourassa · 100.249 km
2017	12h	39	David Stores · 106.430 km	Laura Sheridan · 113.780 km
2016	12h	45	John Cash · 135.632 km	Lori Griswold · 83.911 km

The field grew 7% between 2025 (27) and 2026 (29). 41% 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.

Course notes

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

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.

Topo Athletic

Traverse

★★★★★ 4.5

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

Skratch Labs