Geology

Amboy Crater

San Bernardino County, CA

Coordinate verified

A classic cinder-cone volcano and lava field along historic Route 66 in Mojave Trails National Monument. A roughly 3-mile round-trip trail crosses the black basalt flow to the crater rim for views across the Bristol Lake basin. BLM day-use site with paved parking, vault toilets, and picnic shade—strong family-accessible desert geology stop.

Field facts

RegionSan Bernardino County, CA
Coordinates34.5567, -115.7801
AccessCrater Road S from National Trails Highway (Route 66) near Amboy; paved parking; free; ~1.5 mi one-way trail to rim
Managing agencyBLM / Mojave Trails National Monument
DesignationNational Natural Landmark
GNIS craterfeature_id 238580 at 34.54388, -115.79111 (rim destination)

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Public recreation data — BLM & Recreation.gov (RIDB). Verify current access, fees, and seasonal closures before traveling.

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Plan ahead. Leave no trace. Verify current access before traveling.