The main rivalry is with North Dakota State University. The Dakota Marker is the trophy awarded to the winner of the annual college football game played between the two. The trophy is a replica of one of many stone boundary markers that can be found along the border between the states of South Dakota and North Dakota. South Dakota State also battles their in-state rival, the University of South Dakota. South Dakota State has not lost to their in-state rival since 2000; however, despite the one-sided nature of the rivalry, it has been dubbed the South Dakota Showdown Series.