Comprehensive Guide Collection for White Sands National Park in New Mexico

The world's largest gypsum dunefield, a sea of white sand in the New Mexico desert

White Sands National Park

White Sands National Park occupies a unique position in the American protected areas landscape, preserving not only a geological wonder but also a living laboratory of adaptation and survival. The Tularosa Basin, where the park is situated, has a rich geological history dating back to the Permian Period when shallow seas left behind gypsum deposits that would eventually form the dramatic white dunes. The current dunefield began forming approximately 7,000 to 10,000 years ago as ancient Lake Otero dried, leaving behind selenite crystals that wind and water broke down into the fine white sand that defines the landscape today. Unlike desert dunes found elsewhere in the world, which are typically composed of silica-based quartz, the gypsum dunes of White Sands represent a rare geological phenomenon. The sand remains cool to the touch even on hot days because gypsum has a low thermal conductivity, and the dunes constantly shift and reform under the prevailing southwestern winds, creating an ever-changing landscape. The park is completely encircled by military installations, creating a unique juxtaposition of natural preservation and national defense that has shaped its management and visitor experience since the establishment of White Sands Missile Range in 1941.