Low hanging storm clouds form over the dune field at sunset. Great Sand Dunes National Park and Preserve contains the tallest sand dunes in North America. The Dunefield, topping off with Star Dune at 750 feet, is created by sand trapped by the nearby Sangre de Christo Mountains (larger rougher grains and pebbles) and the San Juan Mountains (65 miles to the west). Waterways such as Medano Creek help carry the sediment down to the San Luis valley where the dunes are found. Great Sand Dunes National Park and Preserve, Mosca, Colorado.
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- © 2008 Jason O. Watson. All rights reserved.
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travel North America United States of America USA US Colorado CO history historical historic tour tourism tourist attraction destination scene scenery scenic blue sky day daytime morning geological geology public land National Park National Park Service NPS canyon rock formation Great Sand Dunes sand dunes preserve preservation landmark famous southwest erosion mountain San Luis Sangre de Cristo dunefield America U.S. United States Great Sand Dunes National Park and Preserve environment ecology ecosystem environmentalism nature
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