can you ski on them?Great Sand Dunes National Park. It's in the San Luis Valley, about 4 hours southwest of Denver. Fascinating place, 30 square miles of dunes deposited in a corner of the valley up against 14,000' mountains. Dunes have a vertical rise of 750'. In May a warm, shallow creek/spring flows beside the base of the dunes. It's like the beach, except 1000 miles from the nearest ocean.
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