Lava River Cave: A Subterranean Journey Through Volcanic History

The Lava River Cave, also known as Lava Tube, is a remarkable geological site located approximately 14 miles northwest of Flagstaff, Arizona, within the Coconino National Forest. This unique cave was formed around 700,000 years ago by a volcanic eruption in the nearby Hart Prairie. During the eruption, lava flowed from a volcanic vent, and the outer layers hardened, creating a tube-like structure while molten lava continued to flow inside. Once the eruption ceased, the remaining lava cooled, leaving behind a fascinating 3/4 mile-long tunnel.Lumbermen discovered the cave entrance in 1915. The cave's consistently cool temperatures, ranging from 35° to 45°F (2° to 7°C) year-round, led early settlers to use it as a natural refrigerator, harvesting ice from the entrance. Today, the Lava River Cave offers an adventurous experience for hikers, geology enthusiasts, and anyone seeking a unique natural attraction.Inside the cave, you'll find a dark and fascinating world. The cave floor features ripple marks and splashdowns, which serve as evidence of the ancient lava flow. The entrance requires some scrambling over loose, slippery rocks, and the cave's ceiling height varies, sometimes requiring crouching or crawling. Be sure to bring sturdy shoes, warm clothing, and multiple sources of light.The cave is generally open year-round, but access may be limited during winter due to road closures. Despite the road conditions, the cave remains a popular destination, offering a glimpse into the region's volcanic past.