Cabeza Prieta National Wildlife Refuge
One of the most remote desert wildlife refuges in the continental United States, home to bighorn sheep and Sonoran pronghorn. A permit and a 4WD vehicle are required.
Cabeza Prieta National Wildlife Refuge adjoins the western side of Organ Pipe Cactus National Monument. It covers about 3,500 square km, most of it designated wilderness with almost no facilities. It is habitat for the endangered Sonoran pronghorn and desert bighorn sheep. To enter, first get a free permit from the monument office in Ajo, where you also sign a border-area notice. Access is limited to high-clearance 4WD vehicles on dirt roads, including the famous Devil’s Highway. Casual visitors can learn about the refuge through the exhibits at the Ajo visitor center. Carry plenty of water and a spare fuel supply, and travel with a partner.
Opening hours
Permit required (office open weekdays)
Nearby sights
- Quitobaquito Springs
- New Cornelia Mine Lookout
- Ajo Plaza
- North Puerto Blanco Drive
- Victoria Mine Trail
- Twin Peaks Campground & Desert View Trail
- Kris Eggle Visitor Center
- Arch Canyon Trail