Which US state lies immediately to the south of South Dakota?
South Dakota Highway 21 South Dakota Highway 21 South Dakota Highway 21 (SD 21) is a state highway in the eastern part of the U.S. state of South Dakota. It connects Lake Norden and Hayti, completely within the south-central part of Hamlin County. SD 21 originally extended from the Nebraska state line to the North Dakota state line, completely concurrent with U.S. Route 81 (US 81). By the mid-1930s, only the current part of the highway remained. SD 21 begins at an intersection with SD 28 just northwest of the main part of Lake Norden. It travels to the north. Almost immediately, it crosses
South Dakota–South Dakota State football rivalry South Dakota–South Dakota State football rivalry The South Dakota–South Dakota State football rivalry (also the South Dakota Showdown Series) between the South Dakota Coyotes and the South Dakota State Jackrabbits is a yearly rivalry match-up in football between the two largest public universities in the state of South Dakota: the University of South Dakota in Vermillion and South Dakota State University in Brookings. South Dakota and South Dakota State are both football-only members of the Missouri Valley Football Conference in the FCS. The football series began in 1889 and has been played a total of 114 times as of 2018.