Basic Information


Welcome to Organ Pipe Cactus National Monument!

This 330,000 acre monument was set aside in 1937 to preserve a pristine example of Sonoran Desert. Organ Pipe Cactus National Monument preserves the northern-most natural habitat of the Organ Pipe Cactus, as well as amazing examples of desert plants, animals, geology, and human history. Visitors come ready to enjoy the trails and scenic drives, the star-lit nights and the sun-filled days!

Arizona highway 85 is the main entrance into the monument. The highway and the road into the campground are the only paved roads in the monument; all other roads are dirt and gravel, and some may require a high clearance, 4-wheel drive vehicle to explore - most noteably North Puerto Blanco Drive. Check at the Kris Eggle Visitor Center for road conditions throughout the monument and on our Alerts & Conditions page.

Explore important information below about the monument and discover the many ways to enjoy your stay here in the Sonoran Desert!


All You Need To Know

  • A rocky wash with two waterfalls and a running wash due to rain.
    Alerts & Conditions

    Discover current road, trail, and weather conditions in Organ Pipe Cactus.

  • sunset reflecting in the clouds, with organ pipe cactus in sillouete

    Learn about the uniqueness of the desert climate that enables this natural wonderland to function.

  • Child drinking water in the hot sun
    Desert Safety

    Staying safe in the desert is easy when you follow a few simple steps

  • Two people using binoculars stand by a saguaro cactus
    Things To Do

    Explore the many different ways to recreate, learn about, and experience Organ Pipe Cactus National Monument.

  • Camper securing a tent to the ground

    Organ Pipe Cactus offers many camping options including developed, primitive, and backcountry.

  • woman hiking on a desert trail
    Hike the Desert

    Organ Pipe Cactus has many miles of hiking trails to explore!

  • A ranger, in uniform, talking with two visitors
    Ranger Programs

    During the winter months, learn about Organ Pipe Cactus through our ranger-led programs.

  • faint trail into the mountains with cacit and plants around
    International Biosphere Reserve

    Learn about this international designation and what it means for Organ Pipe Cactus.

  • A ranger holds a black darkling beetle out to a helper.
    Get Involved

    Discover the many ways you can participate in preserving natural lands and resources.

Last updated: January 20, 2023

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Contact Info

Mailing Address:

10 Organ Pipe Drive
Ajo, AZ 85321



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