Question: what city are the sand dunes in colorado
Answer: Great Sand Dunes National Park and Preserve IUCN category II ( national park ) Hiker ascending the 700 ' tall `` High Dune '' Show map of the US Show map of Colorado Show all Location Alamosa and Saguache Counties , Colorado , United States Nearest city Alamosa Coordinates 37 ° 43 ′ 58 '' N 105 ° 30 ′ 44 '' W ﻿ / ﻿ 37.