Size: 46,766 acres (18,925 hectares), including over 33,000 acres (13,354 hectares) designated wilderness. Location and terrain: Southeastern New Mexico; Guadalupe Mountains (primarily limestone) and Permian Basin (primarily gypsum). Elevation: Ranges from 3,596 feet to 6,368 feet (1,036 m to 1,941 m) above sea level. The visitor center is at 4,406 feet (1,343 m).