Devil's Lake is a lake in Sauk County, Wisconsin, United States. It is part of the South Range of the Baraboo Range, about 2 mi (3.2 km) south of the city of Baraboo, Wisconsin. It has no surface outlets, so by some definitions, it is endorheic; however, it possibly drains by underground channels into the Baraboo River, which would make the lake cryptorheic. The lake is one of the primary attractions of Devil's Lake State Park. It is also a popular recreation destination for watercraft, fishing, hiking, and climbing.