How many states in the United States of America have sand dunes?
15 States in the United States have sand dunes. North America's tallest dunes rise over 750 feet high against the rugged Sangre de Cristo Mountains in Colorado.
The main dune field grows to enormous heights not only because of a complex wind regime, but also due to sand carried by Medano and Sand Creeks. These streams seasonally carve out and carry sand from the east and north side of the dunefield and re-deposit it where wind can transport it back to the dune field.
More Info:
www.duneguide.com
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