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Underdown Trail Races

Merrill, United States • 16 Aug 2025

The Underdown Trail Races, organized by IRONBULL, are grassroots trail running and mountain biking events held in Northern Wisconsin. Scheduled for August 16, 2025, participants can choose from various distances, including a 60k, marathon, and half marathon for runners, as well as mountain bike races of 111 miles, 37 miles, and 16 miles. The course features challenging singletrack trails with numerous hills and boardwalks, providing a unique wilderness experience. The event emphasizes a fun and intimate atmosphere, with amenities such as aid stations, awards, and an after-race party with live music. Proceeds support trail maintenance and development. Visit the organization's website for the most recent information.

United States Wisconsin Merrill

Race information

Website
111 mi
111 Mile
60 km
60k
37 mi
37 Mile
26 mi
Marathon
16 mi
16 Mile
13 mi
Half Marathon
Visit the organization's website for the most recent information.
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