Organ Pipe Cactus National Monument

The Organ Pipe Cactus National Monument encompasses 517 square miles of Sonoran Desert with numerous species of desert flora and diverse wildlife populations.

The Arizona state legislature donated this land to the federal government during Prohibition, and the area became a national monument in April 1937.

The monument borders the Tohono O'odham Indian Reservation, preserving centuries of indigenous heritage through archaeological sites and traditional pathways.

Visitors access the monument through Puerto Blanco Drive from State Route 85, with camping facilities and hiking trails available throughout the protected area.

This location remains the sole territory in the United States where both senita and organ pipe cacti grow naturally in their desert habitat.

Location: Pima County

Inception: April 13, 1937

Operator: National Park Service

Part of: Western Arizona

Shares border with: Ajo

Website: https://nps.gov/orpi

GPS coordinates: 31.95400,-112.80095

Latest update: May 27, 2025 08:48