The tallest sand dunes in North America with 30 miles of sandy peaks to explore, the Great Sand Dunes National Park is without a doubt a diverse and interesting adventure. The dunes offer a unique and challenging backpacking experience without any specific trails to follow, so you can blaze your own. The Medano creek flows along the base and the Sangre De Cristo mountains tower an impressive 14,344 feet above. The day these photos were taken, there was still snow visible on the surrounding mountains, and a storm was brewing. On a sunny day there would be magnificent shadows of rich gold color across the dunes.