Embark on the ultimate outdoor adventure with the Underdown Trail Races on August 17, 2024, in Merrill, WI. This longstanding event, steeped in tradition since 1989, invites both trail runners and mountain bikers to test their limits across the rugged terrain of Northern Wisconsin. Located just 6 miles off Highway 51, the Underdown offers a true wilderness experience on trails carved by ancient glaciers, featuring up to 75 challenging climbs, isolated lakes, and numerous boardwalks amidst primarily singletrack paths.
Participants can choose from a variety of distances including a 60K, marathon, and half marathon for trail runners, and 111 mile, 37 mile, and 13 mile options for the Thunderdown in the Underdown mountain bike race. This event is not for the faint of heart; it is a demanding physical and mental challenge that traverses remote areas with spotty cell phone service and the presence of bears. It’s designed for those comfortable with solitude and experienced in wilderness navigation, aiming to push both physical and mental boundaries.
