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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 multiple mountain biking options. 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 custom finisher awards, stocked aid stations, and an after-race party. Proceeds support trail maintenance and development in the area. 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
13 mi
13 Mile
13 mi
Half Marathon
Visit the organization's website for the most recent information.
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