TRAILGRAPH

Organ pipe cactus and mountains at sunset
National Monument

Organ Pipe Cactus National Monument

Arizona

Tonight

🌗 46% moon

7.4 h fully dark

Hikes

Easy–Strenuous

🟢 🔴

Crowds

low

Open today

Open

Entrance

$25

Caution

Feral Dogs May Be Seen in Organ Pipe Cactus National Monument

Feral dogs may be present at the Twin Peaks Campground and around the Kris Eggle Visitor Center. Visitors should not attempt to feed or water these dogs or approach them in any way as they may carry disease or become hostile.

Caution

Pozo Nuevo Road to Bates Well Ranch High Clearance, 4-Wheel Drive Only

High Clearance, 4-wheel drive is required from where Pozo Nuevo Road begins along South Puerto Blanch Drive to Bates Well Ranch area. The road is washed out in areas. Bates Well Ranch is still accessible from the north on Darby Well Road.

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.

Activities

Topics

Entrance fees

$25.00Entrance - Private Vehicle

$20.00Entrance - Motorcycle

$15.00Entrance - Per Person

Hours & seasons

The monument is open 365 days a year and park roads and trails are open 24 hours. There is no gate at the monument entrance; entrance fees are paid for at the visitor center. There is no dispersed camping allowed anywhere in the monument. US-Mexico Border hours are 6 am-8 pm. The main season for visitors is December through the end of April, during the mild winter months and wildflower season. Campgrounds may fill during this time; check Recreation.gov for campsite availability.

Generally open:

winterspringsummerfall

Hours are reported by the park — verify before you go.

Conditions

Quietest months (fewer crowds): Jun, Jul, Aug, Sep

Typical crowds: low

Weather now: ☀️ Clear, 93°F

☁️ 102°/77°

☁️ 105°/81°

🌦️ 107°/78°

Typical monthly recreation visits · NPS avg 2023–2025 orange months are the quietest by crowds.

Quietest months

Relative crowds by month — lighter is quieter; ringed months are the calmest by crowds.

Jan

82%

Feb

98%

Mar

100%

Apr

67%

May

41%

Jun

34%

Jul

20%

Aug

36%

Sep

33%

Oct

40%

Nov

47%

Dec

53%

% of the busiest month's visits.

Log a sky reading

Measured the sky with an SQM meter or app? Add your reading (16 = city glow … 22 = pristine). Opt in under “Travelers like you” to share it on the community leaderboard.

Things to do

Hike the Historic Old County Road! · 8 mi · 100 ft gain · Time is to hike the trail one way, not round trip.

🟢 Hike the Senita Basin Loop · 3.1 mi · 13 ft gain

🔴 Hike the Estes Canyon/Bull Pasture Loop · 3.6 mi · 4808 ft gain

Hike to Lost Cabin · 8 mi

Hike to Victoria Mine · 2.2 mi

Unearth Dripping Springs Mine · 1.4 mi · 50 ft gain

Hike Alamo Canyon · 1.8 mi · 100 ft gain

🟢 Hike Arch Canyon · 1.2 mi

Campgrounds

Alamo Canyon Campground · 4 sites

Twin Peaks Campground · 208 sites · dump station

Visitor centers

Kris Eggle Visitor Center

Accessibility

Accessible RoomsBrailleRestroom - AccessibleWheelchair AccessibleAudio DescriptionAccessible RestroomAccessible Parking

1 accessible campground(s)

21 audio-described place(s)

Reported by the park — verify before you go.

Parking

Kris Eggle Visitor Center Parking Lot · 42 accessible spacesaccessible

Not an official safety source — always defer to NPS.gov and rangers for life-safety decisions.

By the numbers

A visual read on Organ Pipe Cactus National Monument — its character, trails, sky, and weather.

Park fingerprint

How this park scores across the dimensions travelers care about.

Trail difficulty

Difficulty mix across this park's trails.

Trail profile

Each dot is a trail — distance vs. elevation gain, by difficulty.

3-day forecast

Daily high and low temperatures (°F).

Passport stamps

Mark the stamps you've collected — they show in your memory and along your routes.

🎫 Kris Eggle Visitor Center

Places to see

Ajo Mountain Drive Stop 1

Ajo Mountain Drive Stop 1

audio
Ajo Mountain Drive Stop 10

Ajo Mountain Drive Stop 10

audio
Ajo Mountain Drive Stop 11

Ajo Mountain Drive Stop 11

audio
Ajo Mountain Drive Stop 12

Ajo Mountain Drive Stop 12

audio
Ajo Mountain Drive Stop 13

Ajo Mountain Drive Stop 13

audio
Ajo Mountain Drive Stop 14

Ajo Mountain Drive Stop 14

audio
Ajo Mountain Drive Stop 15

Ajo Mountain Drive Stop 15

audio
Ajo Mountain Drive Stop 16

Ajo Mountain Drive Stop 16

audio
Ajo Mountain Drive Stop 17

Ajo Mountain Drive Stop 17

audio
Ajo Mountain Drive Stop 18

Ajo Mountain Drive Stop 18

audio
Ajo Mountain Drive Stop 2

Ajo Mountain Drive Stop 2

audio
Ajo Mountain Drive Stop 3

Ajo Mountain Drive Stop 3

audio

Audio & media

🎧

🎬

🖼

Learn more

A Changing Bimodal Climate Zone Means Changing Vegetation in Western National Parks

When the climate changes enough, the vegetation communities growing in any given place will also change. Under an expanded bimodal climate zone, some plant communities in western national parks are more likely to change than others. National Park Service ecologists and partners investigated the future conditions that may force some of this change. Having this information can help park managers decide whether to resist, direct, or accept the change.

Bat Projects in Parks: Organ Pipe Cactus National Monument

Better training for employees means better chances for bats in Organ Pipe National Monument!

Bipartisan Infrastructure Law funding ensures long-term success of native plants in Western U.S. national parks

Thanks to funding from the Bipartisan Infrastructure Law, NPS projects in the West hope to collect native seeds to aide in accelerating repairs to damage due to wildfire, mining, flood, or other causes.

Cenozoic Era

The Cenozoic Era (66 million years ago [MYA] through today) is the "Age of Mammals." North America’s characteristic landscapes began to develop during the Cenozoic. Birds and mammals rose in prominence after the extinction of giant reptiles. Common Cenozoic fossils include cat-like carnivores and early horses, as well as ice age woolly mammoths.

Changes over 30 years in populations of the leafcutter ant Atta mexicana at Organ Pipe Cactus National Monument: An analysis of long-term environmental impacts on population size and survival

A social insect biologist analyzes longtime environmental impacts on population size and survival.

Changing Patterns of Water Availability May Change Vegetation Composition in US National Parks

Across the US, changes in water availability are altering which plants grow where. These changes are evident at a broad scale. But not all areas experience the same climate in the same way, even within the boundaries of a single national park. A new dataset gives park managers a valuable tool for understanding why vegetation has changed and how it might change in the future under different climate-change scenarios.

Climate Monitoring in the Southern Plains, Sonoran Desert, and Chihuahuan Desert

Climate is one of many ecological indicators monitored by the National Park Service (NPS) Division of Inventory & Monitoring (I&M). Climate data help scientists to understand ecosystem processes and help to explain many of the patterns and trends observed in other natural-resource monitoring. In NPS units of the American Southwest, three I&M networks monitor climate using the scientific protocol described here.

Climate and Groundwater Monitoring at Organ Pipe Cactus National Monument: Water Year 2024

Sonoran Desert Network scientists visit Organ Pipe National Monument every year to monitor climate and groundwater. By taking measurements of these key resources each year, we can better understand how they may be changing over time. This information can help us understand changes in other natural resources on the park as well. This report summarizes Water Year 2024 climate and groundwater data at the park.

How Organ Pipe Cactus National Monument connects

This park's activities, topics, location, and on-the-ground places — one hop in the graph. Drag to explore; click an activity, topic, or related park to follow it.

Park

Activity

Topic

State

Campground

VisitorCenter

PassportStamp

ParkingLot

Trail

ThingToDo

Alert

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