Two interstate highways cut across South Dakota. Interstate 90 runs east-west through the state with access to Sioux Falls, Mitchell, Rapid City and Spearfish. Interstate 29 runs north-south through the eastern part of the state from the North Dakota border to Brookings, Sioux Falls and North Sioux City. And while the interstates can help you make good time, don’t forget to have a good time exploring alternate routes and scenic byways whenever possible. Request a state highway map, guides or brochures by completing the form on the Request A Vacation Guide page.
View and/or download our detailed state map.