The southern segment of the Badger State Trail runs for 33 miles from the Illinois border to Purcell Road near the southwest corner of Fitchburg. This segment passes through the communities of Clarno, Monroe, Monticello, Exeter, Belleville, and Basco.
Between Monticello and Belleville, in the town of Exeter, the trail goes trough the 1,200-foot-long, nearly 120-year-old Stewart Tunnel. Flashlights are recommended for going through the tunnel and bikers must walk their bikes.
The surface of this section is crushed limestone suitable for walking, bicycling, and snowmobiling. Bicyclists age 16 and older must have a state trail pass.
Winter all-terrain vehicle use will be permitted between Monroe and Monticello on a trial basis. A two-mile segment, yet to be determined, will have a parallel horse trail. Development of this horse trail is contingent on development of 6 miles of horse trail elsewhere in the area. See the current conditions page for a list of all trail uses and to see what is open now.