Along Mexico Highway 40, about 97 miles east of Mazatlan and 105 miles west of Durango, along El Espinazo del Diablo, 4.1 miles west of Las Bancos and 20.2 miles east of El Palmito, 15.1 miles west of La Cuidad, Sierra Madre Occidental, on steep volcanic slopes associated, Durango, Mexico, North America