Valles Caldera National Preserve

The Valles Caldera is a 13.7-mile-wide (22.0 km) volcanic caldera in the Jemez Mountains of northern New Mexico. Hot springs, streams, fumaroles, natural gas seeps, and volcanic domes dot the caldera landscape. The highest point in the caldera is Redondo Peak, an 11,254-foot (3,430 m) resurgent lava dome located entirely within the caldera and surrounded by moat-like flows of rhyolitic solidified lavas. Located within the caldera are several grass valleys, or valles, the largest of which is Valle Grande, the only one accessible by a paved road. In 1975, Valles Caldera was designated as a National Natural Landmark by the National Park Service with much of the caldera being within the Valles Caldera National Preserve, a unit of the National Park System. The area has a varied history involving cultural significance, economic resources, scientific studies, and complex geological setting.