Book excerpt: El Camino Del Diablo (the Devils Highway) today is an unpaved 130 mile route along the border between Arizona and Sonora, Mexico. The current route begins at Lukeville, Arizona 21 miles southwest of Ajo at the boundary between Organ Pipe Cactus National Monument and Cabeza Prieta National Wildlife Refuge. From there it continues through barren and isolated Sonoran Desert to Yuma. Some of the features along the way are: San Cristobal Wash, the Agua Dulce Mountains, Papago Well; Camp Grip, the Pinta Sand Dunes and the Pinacate Volcanic Field. The road passes through the Tule Desert and Mountains and into Tule Tank Canyon to reach Tule Well where the road intersects with Christmas Pass Road. The road continues through the Lechuguilla Desert, Tordillo Mountain, and the Tinajas Altas Mountains. The route passes west of Raven Butte and Cipriano Pass. It then follows the western border of the Gila Mountains, passing by the abandoned Fortuna Mine before finally reaching the small community of Fortune Hills on the outskirts of Yuma.