Last updated: August 30, 2021
South Puerto Blanco Drive is a two-way, graded dirt road that follows the southern boundary of the park and provides access to Senita Basin and Quitobaquito Springs. Great examples of organ pipe, senita, and saguaro cacti are visible along this route. This road can be washboarded – reduce your speed and allow extra time. These roads are doable in a normal passenger car. Trailers, buses, and motorhomes over 25 feet (8 meters) are prohibited on the drive.
South Puerto Blanco Drive to Quitobaquito and back
28 mi (45 km), 3 hours round-trip
This drive parallels the international border for several miles and provides access to Quitobaquito Springs, an oasis in the middle of the desert. Quitobaquito is one of the few habitats of the endangered Quitobaquito Pupfish and Sonoyta Mudturtle.
South Puerto Blanco Drive to Senita Basin Trailhead and back
14 mi (23 km), 2 hours round-trip from Hwy 85
This drive offers the quickest access to Senita Basin trailhead. Along the way, you will see the greatest concentration of senita cacti in the monument, and one of the few places where you can see all three of the park’s columnar cacti coexisting: senita, organ pipe, and saguaros. A large network of hiking trails can be accessed from the Senita Basin trailhead.
Picnic areas are available at Senita Basin and Quitobaquito. No restrooms are available along this drive.
Water is not available anywhere along the drive so carry plenty with you. Bring at least 1 gallon of water per day per person.
Fires and camping are not allowed on the drive.
Pets are not allowed on trails or in the backcountry. They must be leashed at all times. Please do leave pets unattended.
Do not cross washes when flooded.
Do not pick up hitchhikers. Report any suspicious activity to park staff immediately. Do not contact any suspicious persons. If you see them in distress, contact a ranger for help.
- South Puerto Blanco Drive to Quitobaquito and back: 3 hours round-trip
- South Puerto Blanco Drive to Senita Basin Trailhead: 2 hours round-trip
Entrance fee required for day use. Please pay in person at the Kris Eggle Visitor Center, or at one of the self-registration stations.
Vehicles: $25 (Good for 7 days)
This fee includes all occupants of a vehicle.
Motorcycle: $20 (Good for 7 days)
Individuals: $15 (Good for 7 days)
This fee applies to bicycles and walk-ins (per person)
Hikers of many different abilities have hiked routes along Ajo Mountain Drive in the past. If you are curious about accessibility for your needs please contact the park.
While pets are not allowed on trails along the scenic drive, service animals are allowed.