The nearest town is Alamosa, Colorado, to the southwest of the national park. From Denver, take the Interstate 25 to Walsenburg, then west on US Highway 160, and then north on Colorado State Route 150 before reaching Alamosa (View Junction). This takes you north and into the national park.
Great Sand Dunes National Park and Preserve is a national park in Colorado. Covering 84,670 acres (342.6 sq km), it has the tallest sand dunes in North America, some of which rising to as high as 750 ft (230 m) from the floor of the San Luis Valley.