Great Sand Dunes National Park is located 35 miles northeast of Alamosa, Colorado. the Great Sand Dunes are a unique wilderness area protected for all to enjoy. Find out how these dunes were formed. The Great Sand Dunes were made for kids! You can play in the sand, roll or slide down a dune, splash in Medano Creek in spring and early summer, hike in the mountains, see cool interactive exhibits at the Visitor Center, and earn a Junior Ranger badge. There are no poisonous animals or insects in the dunes - they are safe for all ages. Many ranger programs and the bison tours are kid-friendly; ask at the Visitor Center for the best programs for kids during your stay in the park.