River City Sports Share: Watercraft River City Sports Visit Website 3751 E Rosser Ave. Bismarck, ND 58501-3307 (701) 223-9003 (701) 223-9042 (fax) Hours: 8AM-6PM Monday thru Friday. Saturday 9AM-4PM. Closed Sunday About Map About Marine retail and service dealership. New and used boats, Bennche ATV's and Ice Castle Ice Houses. What's Nearby? Distance: 5 10 15 20 25 50 mi.