Great Sand Dunes National Monument
How far do the dunes extend into the distance? The dunes are 8 miles (13km) across. It would take a strong hiker 5 hours to cross them.
How high is the tallest dune? The highest dune rises nearly 700 feet (200m) –taller than a 50 story building.
How much sand is in the dunes? If all the sand was loaded into railroad cars, the train would be long enough to circle the globe more than 20 times. If the sand were spread out ankle-deep it would cover 1/10 of Colorado.
How large are the Sand Grains? The grains that make up the dunes are tiny, about 1mm in diameter, but most measure between 1/8 and 1/4 mm. Smaller particles blow away over the mountains.
Erected by National Park Service US Department of Interior.
Location. 37° 44.336′ N, 105° 31.025′ W. Marker is in Mosca, Colorado, in Alamosa County. Marker is on State Highway 150. Touch for map. The marker is near the Great Dunes National Monument parking lot. Marker is in this post office area: Mosca CO 81146, United States of America.
Other nearby markers. At least 6 other markers are within 4 miles of
Categories. • Natural Features •
Credits. This page was last revised on June 27, 2017. This page originally submitted on June 25, 2017, by Don Morfe of Baltimore, Md 21234. This page has been viewed 69 times since then. Photos: 1, 2, 3. submitted on June 25, 2017, by Don Morfe of Baltimore, Md 21234. • Bill Pfingsten was the editor who published this page.
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