The Great Sand Dunes National Park National Park and Preserve in Duncan, Colorado is home to a diverse ecosystem. Besides the 30 square mile Sand Dunes, including the tallest dunes in North America, it is home to
Creeks, grassland, subalpine forests and alpine tundra offering visual surprises around every corner.
AMT offers guided hiking, sightseeing and backpacking tours in the National Park and the Preserve.