By Mike Rosso What’s a mountain dweller to do when they need to get some sand between their toes? When the nearest ocean is 1,000 miles away? One solution lies close to home in the San Luis Valley. Great Sand Dunes National Park and Preserve sits at the base of the majestic Sangre De Cristo mountains on the eastern side of the San Luis Valley. The park encompasses 107,342 acres and the preserve protects an additional 41,686 acres (65.1 square miles.) The park boasts the tallest sand dunes in North America, covering an area of about 30 square miles. The tallest…