Brownstown, IN, United States · Saturday, December 5, 2026

Fixed Distance 100K

Jackson County 50-50 Ultra-marathon - 100km

60 days away

100 km Distance

not publishedn/a Climbing

5.0 est Grit · Challenging

Calculated from 100 km alone — the organiser has not published an elevation profile. Read 5.0 as a floor, not a verdict.

38.8789° N, 86.0419° W © OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Field size ~88 Mid-sized. Company early, well spread out by halfway.

DUV results for the 2025 edition (100km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.

Typical conditions, December

Daytime high 5°C

Night low -3°C

Rainfall Showers likely

Daylight 9 h 35 m of light

Regional 2001-2020 average for December — NASA POWER, grid elevation 212 m. Not a forecast.

Results history

Year	Race	Finishers	Men's winner	Women's winner
2025	100km	88	Jem Stuart · 11:03:30	Rachel Schack · 11:10:03
2024	100km	74	Alec Cline · 09:41:13	Shea Aquilano · 09:55:43

The field grew 19% between 2024 (74) and 2025 (88). 24% of the 2025 field were women.

DUV results for the 2025 edition (100km) — finishers 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.
nutrition For 100km+ efforts, prioritize real food at aid stations to prevent palate fatigue.

Gear for this race

Chosen for 100 km of trail.

Trail Running Shoes 100 km of trail — cushioning that is still there in the last quarter.
Race Nutrition Past 100 km the palate quits before the legs do — carry more than one flavour.
Hydration Vests Flask capacity for 100 km, without the bounce.
Headlamps 100 km almost certainly means running into the night.
Accessories Chafe and blisters end more 100 km races than fitness does.