South Dakota Highway 20 is a 385.079-mile state highway in northern South Dakota, United States, that connects the Montana state line, west-southwest of Camp Crook, with the Minnesota state line, east

Potter County is a county in the U.S. state of South Dakota. As of the 2020 census, the population was 2,472. Its county seat is Gettysburg. The county was created in 1873 and organized in 1883.