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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 challenging atmosphere, with amenities such as well-marked courses, aid stations, and a post-race celebration featuring food and 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
60 km
60k
26 mi
Marathon
13 mi
Half Marathon
Visit the organization's website for the most recent information.
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