Underdown Trail Races

Sat, Aug 15, 2026
United States
Merrill
1,203m
ironbull.org
Trail
Wisconsin
United States

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Trail in United States, Merrill

Distances

Running
31.5 mile
50.7 km
1,203m
Start: Aug 18, 01:00 PM
Running
31.5 mile
50.7 km
Start: Aug 17, 01:30 AM
500.00 EUR
Running
50k
50.3 km
Start: Aug 17, 01:30 AM
100.00 EUR
Running
21 mile
33.8 km
Running
21 mile
33.8 km
Start: Aug 17, 01:30 AM
400.00 EUR
Running
Half Marathon
21.1 km
Start: Aug 18, 01:00 PM
Running
10.5 mile
16.9 km
Start: Aug 18, 01:00 PM
Running
10.5 mile
16.9 km
Start: Aug 17, 01:30 AM
300.00 EUR
Running
free kids race
1 km
Running
free kids race
1 km
Start: Aug 17, 01:30 AM
0.00 EUR
Running
Free Kids Race
1 km
Start: Aug 18, 01:00 PM
0.00 EUR

About

The Underdown Trail Races are a grassroots trail running and mountain bike event series in Northern Wisconsin, offering a wilderness experience on challenging glacial singletrack with boardwalks, hills, and lake views.

Catering & aid stations

On-course aid stations are stocked with snacks, water, Tailwind, and other essentials; cupless—plan to bring your own hydration system. Finishers receive a post-race party with food, beer, and live music.

Pacers

Pacers will be present with pacerflaggen at designated start waves listed in the Renntag für Laufende schedule; refer to the racer guide for target times and wave assignments.