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
U.S. Route 51 in Kentucky U.S. Route 51 in Kentucky U.S. Route 51 (US 51) in Kentucky runs through the western portion of the state from the Tennessee state line at Fulton to the Illinois state line at Cairo, Illinois. It is a mostly rural route, also serving the towns of Clinton, Arlington, Bardwell and Wickliffe. It also carries part of the Great River Road near the northern end of its route in Kentucky. US 51 mainly runs through the Jackson Purchase region of Kentucky, spanning the four westernmost counties in Kentucky, beginning with a four-lane section crossing the state line, which begins a concurrency