White Sands National Park covers approximately 145,762 acres (227.8 square miles or 589.9 square kilometers).
This area encompasses the southern 41% of a larger 275 square mile (710 square kilometer) field of white sand dunes, which are primarily composed of gypsum crystals. The park protects a significant portion of this unique geological formation.
Therefore, while the dune field itself is larger, the national park that protects a significant portion of it, is approximately 227.8 square miles.
