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
Kickapoo State Recreation Area was located at the junction of the Middle Fork and Salt Fork Rivers. The village was home to Kennekuk, a Native American known as the "Kickapoo Prophet," who brokered many treaties between the European settlers and Native Americans. Kennekuk was a proponent of a new form of Christianity that had elements of Roman Catholicism and Protestantism. The Native Americans lived in the area which is now Kickapoo State Park until sometime during the 16th century. Europeans were drawn to what is now the Kickapoo State Recreation Area with the discovery of salt springs in 1819. Most of the immigrants to