Lava River Cave: A Subterranean Wonder
Explore a 700,000-year-old lava tube near Flagstaff, Arizona, with year-round cool temperatures and unique geological features.
Descend into the depths of the Lava River Cave, a mile-long lava tube formed approximately 700,000 years ago by a volcanic eruption near Hart Prairie. Located just outside Flagstaff, Arizona, this unique geological feature offers a cool escape from the desert heat and a glimpse into the region's volcanic past.
A brief summary to Lava River Cave
- 171B Forest Rd, Flagstaff, Arizona, 86001, US
- +1928-526-0866
- Visit website
Local tips
- Wear warm clothing, even in summer, as the cave temperature remains between 35° and 45°F.
- Bring at least two reliable light sources per person; headlamps are recommended for hands-free navigation.
- Wear sturdy hiking boots or closed-toe shoes with good traction due to the uneven and slippery cave floor.
- Check road conditions before visiting, especially during winter, as Forest Roads 245 and 171 may be closed.
- Be prepared to scramble over rocks and crouch in low areas; assess your physical abilities before entering.
Getting There
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Driving
From downtown Flagstaff, head north on US-180 for approximately 9 miles. Turn left onto Forest Road 245 (FR-245). Continue for 3 miles, then turn left again onto Forest Road 171. Drive for 1 mile and turn left onto FR 171B, which leads to the Lava River Cave parking area. The final stretch on FR 171 and 171B is unpaved. A high-clearance vehicle is recommended, especially in wet conditions. Parking is free at the trailhead parking lot. Note that FR 245 and FR 171 may be closed during winter.
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Walking
From the parking area, the Lava River Cave entrance is a short, approximately 0.15 mile walk east along a well-marked trail. The trail is mostly flat and easy to navigate. The entrance is marked by a circle of rocks and a sign. Be prepared to scramble down a steep, rocky slope to enter the cave.
Discover more about Lava River Cave
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