2017 Map of Border

About this map

Border Junction marks the convergence of transit and state lines in this high-elevation corridor where Idaho and Wyoming meet. The landscape is defined by the hydrologic engineering of the Thomas Fork Valley, where the Thomas Fork and its complex network of irrigation features like the Raymond Canal and Etcheverry Ditch support the ranching economy of the high plains. The Bear River meanders through the southern half of the sheet, flanked by the Preuss Range and the Sublette Range, which create natural barriers only overcome by passages like Border Summit. This map illustrates the vital role of water management in the intermountain West, visible in the numerous diversions such as Miller Ditch, Nuffer Canal, and Rocky Point Ditch that lace the valley floors between Chausse and the Rio Oso Ranch.