description Lava River Cave (Arizona) Overview
The Lava River Cave is a subterranean geological formation located within the Coconino National Forest near Flagstaff, Arizona. It was created approximately 700,000 years ago by a basaltic lava flow from a nearby volcanic eruption, leaving behind a cooled, tube-shaped tunnel. The cave stretches for nearly a mile and maintains a consistently cold internal temperature throughout the year. It is open to the public and serves as a destination for hikers and recreational cavers equipped with independent light sources.
help Lava River Cave (Arizona) FAQ
How long is Arizona's Lava River Cave?
The northern Arizona tube is approximately three-quarters of a mile long, with a surveyed length around 3,820 feet. It is considered the longest known lava cave of its type in Arizona.
Is Lava River Cave near Flagstaff the same cave as the one near Bend?
No. This Lava River Cave is in Arizona's Coconino National Forest, while Oregon has a separate attraction with the same name in Deschutes National Forest near Bend.
Why is the entrance to Lava River Cave slippery?
Temperature differences cause moisture to condense on the rock around the entrance. That moisture can make the ceiling, floor, and loose basalt slick even though much of the deeper Arizona cave is dry.
Do I need a flashlight in Arizona's Lava River Cave?
Yes, the interior is completely unlit and contains uneven blocks and low sections. Each visitor should carry a dependable light plus a backup rather than relying on a phone.
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