• View of Grand Canyon National Park at sunset from the South Rim

    Grand Canyon

    National Park Arizona

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  • Expect Cooler Nights with No Precipitation through the Remainder of the Week

    Monsoonal weather patterns have moved into the Grand Canyon area decreasing fire danger. As a result, on Tuesday, July 8 at 8 a.m. fire managers lifted fire restrictions within Grand Canyon National Park. More »

  • Two Bats Collected in the Park Have Tested Positive for Rabies

    One on the North Kaibab Trail and the other at Tusayan Ruin/Museum. Rabies can be prevented if appropriate medical care is given following an exposure. Any persons having physical contact with bats in Grand Canyon National Park, please follow this link. More »

Cave / Karst Systems

Hidden within the Grand Canyon are an estimated 1,000 caves. Of those, 335 have been recorded. Very few have been mapped or inventoried. Most have developed in the limestone of the Redwall and Muav formations, although some are known to exist in other formations. Some caves are well known and, over the years, have been frequented often by visitors, such as the Cave of the Domes on Horseshoe Mesa.
Hikers standing in the entrance to the Cave of the Domes
Hikers standing in the entrance to the Cave of the Domes on Horseshoe Mesa.
NPS Photo by Michael Quinn
Formations within the Cave of the Domes.

Inside Cave of the Domes

Cave resources include unique cave formations or "speleothems," mummified remains of extinct Ice Age fauna, archeological remains (including split-twig figurines), and unique biological systems. Many caves also play a major role in regional hydrology, as evidenced by incredible waterfalls and substantial streams emerging from places like Vaseys Paradise, Cheyava Falls, and Roaring, Thunder, and Tapeats springs.

Under the current park policy, All caves (with the exception of the Cave of the Domes on Horseshoe Mesa) are currently closed to visitation, except for research purposes. Please contact Deanna Greco, Physical Science Program Manager, for additional information (928) 638-7817.
arrow shape engraving scratched in cave wall.
Cave Monitoring
This engraving was scratched in a Grand Canyon cave. Unfortunately, due to the unique preservative quality of caves, this mark is irreversible.

Dealing with unauthorized access (caving in the Park is illegal) is one of the biggest problems the cave management staff of the park's Physical Science Program deals with in Grand Canyon National Park.

The caves of Grand Canyon National Park represent a unique and fragile resource. Mineral formations, fossil bones of extinct animals and prehistoric artifacts have been found in Grand Canyon caves.
These resources are non-renewable and have both scientific and aesthetic value. In order to evaluate man-caused impacts to Grand Canyon caves, there is an established monitoring program in the park.

Did You Know?


There are different river trip opportunities through Grand Canyon National Park, including professionally guided raft trips, available to the public and often reserved a year or two in advance; and self-guided, or "private" river trips, made available to the public through a weighted lottery. More...