U.S. Highway 80 through the backcountry, Yuma to San Diego. A photographic history of Highway 80 across the desert of the Imperial Valley and over the mountains in eastern San Diego County. Areas include: Yuma, Winterhaven, Algodones Sand Dunes, Holtville, El Centro, Calexico, Ocotillo, Mountain Springs Grade, Jacumba, Boulevard, Buckman Springs, Pine Valley, Guatay, Descanso, Viejas, Alpine, Flinn Springs, Glenview, El Cajon, and many more.