Not all biking is mountain biking. Even if you have a mountain bike.
The Sparta-Elroy trail is part of an old railroad bed, for the Chicago-Northwestern Railroad. Its a flat crushed granite trail. It draws hundreds of tourists a week, and one of the biggest draws on the trail is the set of railroad tunnels that you have to walk through. The tunnels are all ~60 degrees (nice on a hot day) and the longest one is almost 3/4 mile.
Location: Sparta, WI
Directions: You can pick up the start of the trail out in front of Speed's Bike Shop, 1126 John Street, Sparta, Wisconsin 54656
Technical Level: Low, it's a gravel grinder
Length: 32 miles (each way, it's an out and back)
Trails: Crushed granite, little or no grade
Trail Map: Map
Extras: Snack stops on the trail
Post Ride Beer: New Glarus Spotted Cow Ale
GPS File: GPX Format