National Natural Landmarks

Valles Caldera

Valles Caldera
Valles Caldera

The Valles Caldera is a large circular depression, 12 to 15 miles in diameter, with scalloped walls rising from a few hundred to more than 2,000 feet above the present floor. Located primarily within the Valles Caldera National Preserve, the site is one of the largest calderas in the world and is an excellent example of a caldera advanced in history but still retaining the essential structures.

Location: Rio Arriba County, NM ; Sandoval County, NM

Year designated: 1975

Acres: 99,218

Ownership: Federal




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