Fat Tire Biking

Grab your fat tire or mountain bike and spend a weekend riding Merrill area trails. If you’ve ever wanted to ride a snowy rollercoaster through the woods and down rolling hills, well, now you can!  In winter, many of the trails listed below are groomed, but please call in advance to make sure. 

Click here for a map showing trails in Merrill Memorial Forest and the Underdown Recreation Area.



Merrill bike trail
Photo by Merrill Foto News

Merrill Memorial Forest

W3259 Heineman Rd, Merrill, WI  54452
More than seven miles of hiking and biking trails were built in Merrill Memorial Forest in 2016. A new, 5.1-mile loop of hiking and trail feature breathtaking views of the Prairie Dells gorge. The one-mile marsh loop offers spectacular views of the Mathei Marsh. A 2.5 trail connects the new trail to existing trails in the Underdown Recreation Area. In contrast to the expert, single-track trails in the Underdown, the new machine-built trails in the Merrill Memorial Forest are for beginning and intermediate bikers.

Underdown Recreation Area

W3221 Copper Lake Ave, Irma, WI  54442
The Underdown Recreation Area features 12 fat tire and mountain bike trail segments, totaling about 20 miles. Some sections are very challenging and geared for expert riders. Portions of the trail are used for the annual Thunderdown in the Underdown Mountain Bike Race. The marked horse trails are available for beginning bike riders or for family outings. Please yield the right of way to horses when encountering them on the trail.



(715) 539-1034
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