Ironbull Ultra Trail

Rib Mountain, United States • 13 Sep 2025

The Ironbull Ultra Trail event, known as the Rib Mountain Trail Races, takes place in Wausau, Wisconsin, at Rib Mountain State Park. It features three race distances: a challenging 50k consisting of three loops with over 7,000 feet of elevation gain, a 25k with 1.5 loops, and a 15k single loop with more than 2,500 feet of climbing. The course offers technical single-track trails and scenic views beneath colorful hardwoods, starting and finishing near Granite Peak Ski Area. Aid stations support runners along the route. Post-race festivities include food, music, and local craft beer at the Sundance Chalet, celebrating finishers and volunteers. Visit the organization's website for the most recent information.

Race information

50 km
3400 m+
50k
25 km
3400 m+
25k
15 km
1400 m+
15k
Visit the organization's website for the most recent information.
Trail runs nearby

The Wausau Trail Run is an exciting running event scheduled for July 25-26, 2025, in Wausau, Wisconsin. As part of the Wausau 24 weekend, it features various trail running distances, including a 5K, 10K, and Half Marathon, all set on the scenic single track mountain bike and ski trails at Nine Mile..

Wausau 24 is the largest 24-hour mountain bike race in the Midwest, held annually at Nine Mile County Forest near Wausau, Wisconsin. Participants can compete solo or in teams across 6, 12, and 24-hour race categories, completing as many laps as possible on a challenging course. The event features a..

The Underdown Trail Races, held in Merrill, Wisconsin, offer a challenging and scenic trail running experience on August 16, 2025. The event features distances of 60k, marathon, and half marathon through the Underdown Trail system, known for its backcountry singletrack trails shaped by ancient glaci..

The WausaUltra event, held in Wausau, Wisconsin at Sylvan Park, offers three race formats: Limitless, Double, and Solo. The Limitless race is a "last runner standing" challenge where participants run a 4.167-mile mostly trail loop every hour starting Friday morning, continuing until only one runner..