Best For
Adventurous hikers and families looking for a unique underground exploration.
US
Hiking Area·Rugged, Dark, Adventurous
Lava River Cave offers a rare opportunity to hike through a mile-long subterranean passage formed by molten rock. Located in the Coconino National Forest near Flagstaff, this natural wonder maintains a cool temperature year-round, making it a refreshing escape from the Arizona heat. The trail is rugged and uneven, requiring visitors to scramble over loose rocks and navigate low ceilings in certain sections. Once past the initial entrance, the cave opens into large galleries, though some narrow passages exist for those seeking an extra challenge. It is a primitive environment with no lighting or paved paths, providing a raw and authentic exploration experience for prepared adventurers.
Lava River Cave offers a rare opportunity to hike through a mile-long subterranean passage formed by molten rock. Located in the Coconino National Forest near Flagstaff, this natural wonder maintains a cool temperature year-round, making it a refreshing escape from the Arizona heat. The trail is rugged and uneven, requiring visitors to scramble over loose rocks and navigate low ceilings in certain sections. Once past the initial entrance, the cave opens into large galleries, though some narrow passages exist for those seeking an extra challenge. It is a primitive environment with no lighting or paved paths, providing a raw and authentic exploration experience for prepared adventurers.
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Address
171B Forest Rd,Flagstaff, AZ 86001, USA
Websitefs.usda.gov
Phone(928) 526-0866
Hours
Open nowOpen 24 hours
Highlights
Mile-long natural lava tube formed by ancient volcanic activity.
Year-round cool temperatures, often featuring ice even in summer.
Challenging terrain requiring scrambling over loose volcanic rock.
Complete darkness providing a true spelunking experience.
Occasion Tags
Tourists, Locals, Family, Groups
Reviews
4.8
Excellent1,9 K reviews
Lava River Cave is highly regarded by visitors as a thrilling and unique spelunking-lite experience near Flagstaff. Reviewers consistently emphasize the necessity of being prepared, specifically mentioning the need for multiple light sources like headlamps because the cave is pitch black. The terrain is described as very rocky and uneven, with some scrambling required at the entrance, making sturdy hiking boots essential. Many visitors note the surprisingly cold temperatures inside, recommending jackets or sweaters even in summer. While the cave is considered family-friendly—with children as young as five completing the hike—some warn that the low ceilings and tight spots can be challenging. Overall, it is praised as a rewarding adventure for those who come equipped for a rugged underground trek.
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Location
Flagstaff, Arizona, United States