Idaho State Highway 51 February 2015, some map products such as Google Maps still show SH-51's former overlay with American Legion Blvd. SH-51's northern terminus is in the city of Mountain Home in Elmore County. After turning south from Airbase Rd. and the intersection with SH-67, the road crosses the Snake River into Owyhee County and passes through the towns of Bruneau, Grasmere, and Riddle. About from the state border it enters the Duck Valley Indian Reservation. As the road crosses into Nevada it becomes State Route 225. The reservation's only major town, Owyhee is about south of the state border. After another through
Minnesota State Highway 51 The northern terminus of Highway 51 at I-694 in Arden Hills is also shared with the westbound interchange for U.S. Highway 10. From south to north, the route adjoins the campuses of Macalester College, Hamline University, University of Northwestern - Saint Paul, and Bethel University. Como Park, Zoo, and Conservatory in Saint Paul is located 7 blocks east of the junction of Highway 51 (Snelling Avenue) and Como Avenue. Eastbound Como Avenue becomes Horton Avenue. The park entrance is on Horton Avenue near Lexington Parkway. Rosedale Center and Har Mar Mall shopping centers are located on the route in Roseville.