The Badger State Trail travels 40 miles between Madison and the Wisconsin-Illinois border while traversing farmlands, woods, rolling hills, scenic meadows, remnant prairies, ravines, glacial topography and several small communities. Highlighting the trail is the 1,200-foot long Stewart Tunnel. The tunnel is unique because it is built on a curve and visitors cannot see the other end when first entering the tunnel. Flashlights and jackets are recommended as the tunnel is dark and cool and water from springs above can trickle onto the trail. Bikers should walk bikes through the tunnel.
The Badger Trail connects to the Capital City, Military Ridge and Sugar River state trails and the Madison bikeway system. In Madison, the Badger State Trail corridor continues into the city along the Southwest Path. At the Illinois border, the Badger State Trail connects to the Jane Addams Trail which continues to Freeport, Illinois.