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
New York State Route 51 in the mid-1960s. New York State Route 51 New York State Route 51 (NY 51) is a state highway in the central part of New York state. The highway runs generally in a southwest to northeast direction from the hamlet of Mount Upton to the village of Ilion. NY 51 is a two-lane highway its entire length. As NY 51 approaches the northern border of Otsego County, it makes a sharp left before descending to US 20 to the west in West Winfield. A concurrency carries it back to the original path where it again heads northward. Then, at Cedarville,