Natural
Pima County, AZ
Approximate location — plotted from published sources, not a site visit, and not a guarantee of access.
330,000-acre Sonoran Desert national monument on the Mexican border protecting the northernmost wild stands of organ pipe and senita cactus among classic saguaro forests. UNESCO biosphere reserve with scenic drives (Ajo Mountain, Puerto Blanco), desert hiking, and the Kris Eggle Visitor Center on AZ-85.
| Region | Pima County, AZ |
|---|---|
| Coordinates (approx.) | 31.9548, -112.8011 |
| Access | Paved AZ-85 through monument; dirt scenic loops may need high clearance |
| Agency | National Park Service |
| Designations | National Monument (1937); UNESCO Biosphere Reserve |
| Icon | Organ pipe cactus (Stenocereus thurberi) |
Public recreation data — BLM & Recreation.gov (RIDB). Verify current access, fees, and seasonal closures before traveling.
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Plan ahead. Leave no trace. Verify current access before traveling.