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Great Sand Dunes National Park

United States of America

Great Sand Dunes National Park

Great Sand Dunes National Park and Preserve is a national park of the United States that conserves an area of large sand dunes on the eastern edge of the San Luis Valley, and an adjacent national preserve in the Sangre de Cristo Range, in south-central Colorado. The park was originally designated Gr

eat Sand Dunes National Monument on March 17, 1932, by President Herbert Hoover. The original boundaries protected an area of 35,528 acres (55.5 sq mi; 143.8 km2). A boundary change and redesignation as a national park and preserve was authorized on November 22, 2000, and then established on September 24, 2004. The park encompasses 107,342 acres (167.7 sq mi; 434.4 km2) while the preserve protects an additional 41,686 acres (65.1 sq mi; 168.7 km2) for a total of 149,028 acres (232.9 sq mi; 603.1 km2). The recreational visitor total was 527,546 in 2019. The park contains the tallest sand dunes in North America, up to 750 feet (230 m) tall. The dunes cover an area of about 30 sq mi (78 km2) and are estimated to contain over 1.2 cubic miles (5 billion cubic metres) of sand. Sediments from the surrounding mountains filled the valley over geologic time periods. After lakes within the valley receded...

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