Columbia, IL, United States · Saturday, March 20, 2027

Fixed Distance 50 mi

American Bottoms 56mi

185 days away

90 km Distance

230 m Climbing

4.8 Grit · Challenging

38.4437° N, 90.2012° W© OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Climbing rate 3 m / km Fast & Flat. This course is relatively flat and fast. Ideal for PB attempts.

Time limit 15 hours 10:00 min/km average. Generous. Walkable throughout for most of the field. Tighter than 72% of 50 mi races. Measured against 455 races of the same distance. Cut-off calculator →

Field size ~26 Small. Long stretches with nobody in sight.

DUV results for the 2026 edition (55mi) — finishers 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 13°C

Night low 1°C

Rainfall Showers likely

Daylight 12 h 06 m of light

Regional 2001-2020 average for March — NASA POWER, grid elevation 153 m. Not a forecast.

The Aid Station

Course-specific beta from the community

⛰️ terrain

This is a fast & flat course. Expect fast, runnable sections where rhythm is key.

By UltraHub Expert

👟 gear

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

By UltraHub Expert

Gear for this race

Chosen for 90 km of trail with 230 m of ascent.

Trail Running Shoes90 km of trail — cushioning that is still there in the last quarter.
Race Nutrition90 km of self-supported fuelling between aid stations.
Hydration VestsFlask capacity for 90 km, without the bounce.
HeadlampsA 15 h limit puts you out there after dark.
GPS WatchesBattery life first — a 90 km day outlasts most full-GPS modes.

La Sportiva

Prodigio Pro

RunRepeat found the La Sportiva Prodigio Pro to have a secure, locked-in fit due to its premium upper, and also praised the shoe's energetic ride, particularly…

$225 ★★★★★ 4.6

Asics