The Old Plank Road Trail runs from the Kohler Erie Avenue Trailhead in the City of Sheboygan west roughly 17 miles to the hamlet of Greenbush. The terrain varies from flat to gently rolling with one large climb or descent near County Highway S just east of Greenbush. The Old Plank Road Trail was one of the first trails in the nation to share the right-of-way with a 4-lane divided highway. The first sections of the trail were built in the late 1970's with the most recent sections having been added in the early 2000's. As State Highway 23's four lanes are extended west to Fond du Lac, it is the County's intent to extend the Old Plank Road Trail west until the Fond du Lac County line. The entire length of the trail from I43 to STH 57 (approximately 9 miles) has received new pavement since 2008 with the most recent project finishing in 2013.
The trail is shared by a variety of users including cyclists, walkers, joggers, mopeders, equestrians as well as snowmobilers in the winter months. There are four trailheads along the route. Enjoy the many points of interest along the trail as well!