Organ Pipe Cactus National Monument
Designation: National Monument
Location: Arizona
📘 Park Overview
Look closely. Look again. The sights and sounds of Organ Pipe Cactus National Monument, an International Biosphere Reserve, reveal a thriving community of plants and animals. Human stories echo throughout the Sonoran Desert, chronicling thousands of years of desert living. A wilderness hike, a scenic drive, or a night of camping will expose you to a living desert abounding with hidden life.
🌤 Weather Information
Summer months are hot, with temperatures exceeding 100F during the day and night-time temperatures in the high 70's. Winter months are milder, with temperatures in the 70s during the day and 30's to 40's in the evening.
🚗 Directions
The Kris Eggle Visitor Center is located on Highway 85 approximately 25 miles south of Why, AZ and 5 miles north of Lukeville, AZ, just before the US-Mexico Border.
Images
Visit the only place in the U.S. where you can see large stands of organ pipe cacti.
Credit: NPS Photo/ Craig Stocks
Experience the only place in the US where the Organ Pipe Cactus naturally grows
Credit: NPS Photo
Capture amazing views from trails and scenic drives
Credit: NPS Photo/ C Stocks
Experience the wildlife of the most biodiverse desert in North America
Credit: NPS Photo/ D Martin
Experience the rich assemblage of cacti at Organ Pipe Cactus.
Credit: NPS Photo/ K Ceballos
Activities
Topics
Operating Hours
Entrance Fees
Entrance Passes
3-Day Weather Forecast
Wednesday, May 27
Sunny
High: 82.9°F | Low: 61°F
Humidity: 41%
Wind: 26.2 mph
Rain Chance: 0%
UV Index: 9.7
Sunrise: 05:28 AM
Sunset: 07:29 PM
Moon: Waxing Gibbous (90%)
Visibility: 6 mi
Dew Point: 59.6°F
Cloud Cover: 0%
Pressure: N/A mb
Air Quality (PM2.5): N/A
Ozone: N/A
EPA Index: N/A
Thursday, May 28
Sunny
High: 81°F | Low: 58.1°F
Humidity: 41%
Wind: 23.7 mph
Rain Chance: 0%
UV Index: 8.6
Sunrise: 05:27 AM
Sunset: 07:30 PM
Moon: Waxing Gibbous (96%)
Visibility: 6 mi
Dew Point: 57.8°F
Cloud Cover: 0%
Pressure: N/A mb
Air Quality (PM2.5): N/A
Ozone: N/A
EPA Index: N/A
Friday, May 29
Sunny
High: 84.2°F | Low: 57.9°F
Humidity: 34%
Wind: 13.4 mph
Rain Chance: 0%
UV Index: 10.3
Sunrise: 05:27 AM
Sunset: 07:30 PM
Moon: Full Moon (99%)
Visibility: 6 mi
Dew Point: 58°F
Cloud Cover: 0%
Pressure: N/A mb
Air Quality (PM2.5): N/A
Ozone: N/A
EPA Index: N/A
Park Alerts
Park Events
Patio Talk
An interpretive talk that changes daily. Subjects vary broadly, from ethnobotany, mining history, regional culture, and beyond.
Location: Kris Eggle Visitor Center patio
Date: Dec 28, 2025 12:00am to Apr 30, 2026 12:00am
Paid Event
All About the Organ Pipe Cactus
How big can organ pipe cactus grow? Can you eat their fruit? What role do they play in the Sonoran Desert ecosystem?
Have you or someone you know every asked a question like this about the organ pipe cactus? If the answer is yes, then this is the program for you!
Our rangers are ready to teach you everything you need to know about the national monument's namesake cactus!
Location: Kris Eggle Visitor Center patio
Date: Dec 28, 2025 12:00am to Apr 18, 2026 12:00am
Paid Event
Evening Program
A formal interpretive talk on the history, ecology, and/or culture of the Sonoran Desert. Talks change daily; inquire at the Kris Eggle Visitor Center for details.
Location: Twin Peaks Campground Amphitheater
Date: Jan 11, 2026 12:00am to Apr 30, 2026 12:00am
Paid Event
Ajo Astronomy Night
Enjoy Ajo's stunning night sky, gaze through a telescope, and learn about space with rangers from Organ Pipe Cactus National Monument.
Red-light flashlights preferred but not required. The Sonoran Desert can drop below 30F (-1C) during the winter months; for an optimal experience, warm layers are recommended.
This is not a pet friendly event, we apologize for any inconvenience.
Location: E.S. "Bud" Walker Park 290 W 5th Street Ajo, AZ 85321
Date: Jan 23, 2026 12:00am to Jan 23, 2026 12:00am
Paid Event
Sunset Walk/Talk
A relaxed sunset program, designed for all ages, exploring the plants, wildlife, and people of the Sonoran Desert. Talks change daily; inquire at the Kris Eggle Visitor Center for details.
Location: Twin Peaks Campground Amphitheater
Date: Jan 25, 2026 12:00am to Mar 7, 2026 12:00am
Paid Event
Evening Program
A formal interpretive talk on the history, ecology, and/or culture of the Sonoran Desert. Talks change daily; inquire at the Kris Eggle Visitor Center for details.
Location: Twin Peaks Campground Amphitheater
Date: Jan 25, 2026 12:00am to Feb 7, 2026 12:00am
Paid Event
Sunset Walk/Talk
A relaxed sunset program, designed for all ages, exploring the plants, wildlife, and people of the Sonoran Desert. Talks change daily; inquire at the Kris Eggle Visitor Center for details.
Location: Twin Peaks Campground Amphitheater
Date: Feb 8, 2026 12:00am to Apr 30, 2026 12:00am
Paid Event
Evening Program
A formal interpretive talk on the history, ecology, and/or culture of the Sonoran Desert. Talks change daily; inquire at the Kris Eggle Visitor Center for details.
Location: Twin Peaks Campground Amphitheater
Date: Feb 8, 2026 12:00am to Apr 30, 2026 12:00am
Paid Event
Ajo Astronomy Night
Enjoy Ajo's stunning night sky, gaze through a telescope, and learn about space with rangers from Organ Pipe Cactus National Monument.
Red-light flashlights preferred but not required. The Sonoran Desert can drop below 30F (-1C) during the winter months; for an optimal experience, warm layers are recommended.
This is not a pet friendly event, we apologize for any inconvenience.
Location: E.S. "Bud" Walker Park 290 W 5th Street Ajo, AZ 85321
Date: Feb 20, 2026 12:00am to Feb 20, 2026 12:00am
Paid Event
Evening Program
A formal interpretive talk on the history, ecology, and/or culture of the Sonoran Desert. Talks change daily; inquire at the Kris Eggle Visitor Center for details.
Location: Twin Peaks Campground Amphitheater
Date: Feb 22, 2026 12:00am to Apr 4, 2026 12:00am
Paid Event
Visitor Center & Contacts
📍 Physical Address:
10 Organ Pipe Drive
Ajo, AZ 85321
🏤 Mailing Address:
10 Organ Pipe Drive
Ajo, AZ 85321
📞 Voice Phone: 520-387-6849
✉️ Email: orpi_information@nps.gov