Great Sand Dunes Oasis Address: 5400 State Highway 150, Mosca, CO 81146 Phone: (719) 378-2222 Restaurants, Hotels & Motels, Campgrounds, Tours-Operators & Promoters Other Businesses: Zapata Ranch: A Nature Conservancy Preserve at 5303 State Highway 150, Mosca, CO 81146 Great Sand Dunes Lodge at 7900 State Highway 150, Mosca, CO 81146 Great Sand Dune Oasis at 5400 State Highway 150, Mosca, CO 81146 White Rock Specialties at 5401 Terry St, Mosca, CO 81146