Geology

Red Mountain

Coconino County, AZ

Coordinate verified

Unusual U-shaped cinder cone in the San Francisco Volcanic Field (~740,000 years old) with a large natural amphitheater, hoodoos, and dark mineral crystals. Easy USFS Trail 159 (about 3 miles RT) leads from a signed US-180 trailhead into the eroded cone interior.

Field facts

RegionCoconino County, AZ
Coordinates35.5366, -111.8565
Age~740,000 years (USGS)
TrailRed Mountain Trail No. 159
Elevation gain~275 ft
AccessPaved US-180 + short dirt spur

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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.