 After two years of operation, service was extended from Superior to Duluth, Minnesota.The "Arrowhead" began on April 16, 1975 as a daily all-coach train between Minneapolis and Superior, Wisconsin with no intervening stops along the route.The "Arrowhead" departed Superior in the mornings and returned in the evenings; its schedule allowed an easy connection to the "North Coast Hiawatha", which offered daily service from Minneapolis to Chicago, Illinois.