Great Sand Dunes National Park
Unnamed Road, Mosca, CO 81146
Great Sand Dunes National Park and Preserve is open 24 hours a day, seven days a week. The Visitor Center is open 7 days a week except for federal holidays in winter. Hours at the Visitor Center vary seasonally, but are generally 9-4:30 daily in winter, and 9-6 daily during the three summer months. Call the Visitor Center at 719-378-6399 for specific hours when you plan to visit.