Sierra Grande

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Sierra Grande

NM, USA

New Mexico State
Historical Marker

Largest extinct volcano in northeastern New Mexico, Sierra Grande rises to an elevation of 8,720 feet, one of many volcanoes, cinder cones, and flows that cover more than 1,000 square miles of area in northeastern New Mexico and southeastern Colorado eastward to the Oklahoma state line.

Last updated: 10/12/2009 15:10:00