 The start of the 21st century was marked by the opening of two major venues for UND athletics . The Ralph Engelstad Arena , home of men 's and women 's hockey , and the Alerus Center , home of UND football , both opened in 2001 . The Betty Engelstad Sioux Center opened in August 2004 , and currently serves as home to UND volleyball and men 's and women 's basketball . 
