Geology

Valles Caldera National Preserve

Sandoval County, NM

Coordinate verified

NPS national preserve protecting a ~13–14 mile-wide volcanic caldera formed about 1.2 million years ago in the Jemez Mountains. Huge mountain meadows (Valle Grande), resurgent dome Redondo Peak, streams, and abundant elk define one of the Southwest’s premier volcanic landscapes; main gate on NM 4 at mile marker 39.2.

Field facts

RegionSandoval County, NM
Coordinates35.9168, -106.5196
Managing agencyNational Park Service
LandformResurgent caldera / Valles Caldera
Age context~1.2 Ma climactic eruption
Width~13–14 miles
HighlightsValle Grande meadows, elk, backcountry vehicle timed entry

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

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