Sun Valley

City, Blaine county, south-central Idaho, U.S. Sun Valley is a famous year-round recreation area and winter sports resort along the Big Wood River in Sawtooth National Forest, just east of Ketchum. Because of its fine snowpack and calm weather, it was developed by the Union Pacific Railroad, which built Sun Valley Lodge in 1936. From 1943 to 1946 the lodge served as a convalescent centre