Big Stone Lake is a premier fishing destination spanning 12,610 acres along the Minnesota-South Dakota border, stretching 27 miles in length with a maximum depth of 16 feet and an average depth of 11 feet. This natural freshwater lake serves as the source of the Minnesota River and is co-managed by the Minnesota Department of Natural Resources and South Dakota Department of Game, Fish and Parks under Border Waters fishing regulations. The lake's name derives from the abundance of stone, rock, and boulders along its bottom, creating excellent structure for fish habitat. The lake has undergone significant habitat improvements in recent years, with increased water clarity and abundant rooted aquatic plants that have enhanced conditions for bass and panfish while maintaining good populations of walleye and other species.