Great Sand Dunes National Park has the tallest sand dunes in North America, these dunes developed as southwesterly winds blew ancient alluvial sediments from the San Luis Valley toward the Sangre de Cristo Mountains. Great Sand Dunes National Preserve contains the entire surface watershed and primary topographic features interacting with the Great Sand Dunes, ranges in elevation from 8,000 to over 13,000 feet and includes life zones from desert to alpine tundra.
Great Sand Dunes NP was proclaimed Great Sand Dunes National Monument on March 17, 1932.and was redesignated as Great Sand Dunes National Park and Preserve September 24, 2004.
National Park Acreage: 42,983, Federal: 40,430, Nonfederal: 2,553. National Preserve Acreage: 41,686, Federal:41,676, Nonfederal: 10.
Great Sand Dunes National Park is located in southcentral Colorado about 116 miles southwest of Pueblo, Colorado.