Ultra Running Hub La Grange, WI, United States · Sunday, November 8, 2026
Fixed Distance 50K
tBunk Endurance Challenge 50 Km
53 days away
50 km Distance
1,400 m Climbing
4.6 Grit · Challenging
What the course asks
Climbing rate 28 m / km
Rolling. Moderate undulations. Requires consistent effort across varying grades.
Field size ~35 Small. Long stretches with nobody in sight.
DUV results for the 2025 edition (31.2mi) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.
Typical conditions, November
Daytime high 8°C
Night low -1°C
Rainfall Mostly dry
Daylight 10 h 08 m of light
Regional 2001-2020 average for November — NASA POWER, grid elevation 231 m. Not a forecast.
The Aid Station
Course-specific beta from the community
This is a rolling course. Expect fast, runnable sections where rhythm is key.
With trail terrain, choose a shoe with moderate cushioning for optimal performance.
Gear for this race
Chosen for 50 km of trail with 1,400 m of ascent.
- Trail Running Shoes28 m of climb per kilometre — grip and rock protection before cushioning.
- Race Nutrition50 km of self-supported fuelling between aid stations.
- Hydration VestsPole attachment and chest-strap stability on steep ground.
- Trekking Poles1,400 m of ascent to walk up.
- GPS WatchesBattery life first — a 50 km day outlasts most full-GPS modes.
Course Notes
9.19 miles loop with 1,500’ of elevation, using the Nordic trail system in the Southern Kettle Moraine State Forest.
Similar races
Other 50K trail ultras, closest in distance first.