The Sugar River State Trail is a 23-mile (37 km) long, 265-acre (107 ha), recreation rail trail in Wisconsin.
This trail connects four communities: New Glarus, Monticello, Albany and Brodhead. The limestone-surfaced trail is on an abandoned railroad bed, and is used for bicycling, hiking, and snowmobiling.The Sugar River State Trail is part of the Aldo Leopold Legacy Trail System.