Interstate 90 in the US state of South Dakota traverses east–west through the southern half of the state, passing through the cities of Spearfish, Rapid City, Mitchell, and Sioux Falls.
The Lake Francis Case portion of the Missouri River viewed from a rest stop just south of Chamberlain; the pre-Interstate Chamberlain Bridge is in the center
Interstate 190 is an auxiliary Interstate Highway in the US state of South Dakota. The route runs for about two miles connecting I-90 to downtown Rapid City. The entire route is concurrent with US Hig
Northern terminus at I-90