Logo

Ironbull Ultra Trail

Rib Mountain, United States • 13 Sep 2025

Rib Mountain Trail Races, staged by IRONBULL in Wausau, Wisconsin, offer 50k, 25k, 15k trail runs and a kids run. The 2025 course returns to Rib Mountain State Park trails, with each distance around 10.6 miles per loop: the 15k is a single loop, the 25k is 1.5 loops, and the 50k is three loops. Runners encounter the park’s scenic, glacially eroded terrain, including twists, climbs, and hardwood forests. Two main aid stations (top at 5 miles and bottom) plus water along the course support efforts. Finisher celebrations at the finish line feature food, music, and beer; cupless, composting, and Trail Sisters–approved event with sponsor support. Visit the organization's website for the most recent information.

United States Wisconsin Rib Mountain

Race information

Website
50 km
50k
25 km
25k
15 km
15k
Kids Run
Visit the organization's website for the most recent information.
Trail runs nearby

Wausaultra Single, Double, Limitless

Wausau

WausaUltra at Sylvan Park in Wausau features a 4.167 mile mostly trail loop offered as a Limitless backyard event, Solo, Double, and a free kids race over May 1 to May 3, 2026.

The Dormie Challenge: 12-Hour Ultra Marathon

Stevens Point

Experience the first ultra marathon in Portage County on a loop at the UW Stevens Point campus. Choose between 6 hour and 12 hour events with a limited field of 125 runners to support local collegiate athletes.

Wausau Trail Run

Wausau

Experience the sunset at Nine Mile Recreation Area with a series of trail runs on single track mountain bike paths. Choose from multiple distances and navigate technical terrain using your own lights as the sun goes down.

Underdown Trail Races

Merrill

Experience a grassroots wilderness race at the Underdown Trail system in Merrill. Choose between various trail running and mountain bike distances featuring glacial hills, singletrack paths, and scenic boardwalks.