The Spring Mountains are a sky island ecosystem. With an area around 860 square miles (2,200 km2), and a vertical range of nearly 2 miles (3.2 km), the mountains encompass a wide variety of habitats, and the biological diversity is probably greater than anywhere else in Nevada; 37 species of trees are known (more than any other Nevadan range), and 600 species of vascular plants have been reported from the Red Rock Canyon National Conservation Area alone.