- 3818 Rockwood Rd, Manitowoc, WI 54220
Devil’s River State Trail is a scenic rail trail beginning in Manitowoc and running fourteen miles to the Village of Denmark, WI. The trail is great for hiking or biking in the summer months and cross-country skiing or snowmobiling in the winter. It is a great place to watch for wildlife or birds. Leashed dogs are permitted on the trail. Access the trail at Rockwood Road in Manitowoc or off Railroad Avenue near E Pine Street in Denmark.