Great Sand Dunes National Park is located 35 miles northeast of Alamosa, Colorado, reached by U.S. 160 and Colorado 150 from the south, or from Colorado 17 and County Lane 6 from the west.

By car: From Denver, Colorado Springs, or Pueblo, the fastest route is south on I-25 to Walsenburg, west on US 160, north on state highway 150. For a more scenic drive from Denver or Colorado Springs, you may also get on US 285 south, then state highway 17 south, then County Lane 6 east.  From Albuquerque, drive north on I-25 to Santa Fe, then north on US 285 to Alamosa.

By air: Commercial air service is available to a small airport at Alamosa, Colorado. Colorado Springs, Denver, and Albuquerque are served by many commercial airlines. Rental cars are available at all these airports.

By bus or shuttle: The Alamosa Bus Company , 719-589-3384, has some service to the national park.

Mileages to Great Sand Dunes Visitor Center from:

Alamosa: 35 
Albuquerque: 246
Black Canyon National Park: 200
Blanca (town): 25
Boulder: 270
Canon City: 147
Colorado Gators: 25 
Colorado Springs via Salida: 204
Colorado Springs via I-25 Walsenburg: 167
Cortez: 234
Creede: 93
Crestone: 57
Del Norte: 66
Denver via US 285: 234
Denver via I-25 Walsenburg: 242
Durango: 189
Fort Garland: 29
Grand Junction: 252
Gunnison: 135
La Veta: 63
Medano Pass: 13
Mesa Verde National Park: 227
Monte Vista: 54
Montrose: 200
Mosca (closest town to the national park): 23
Pagosa Springs: 125
Pueblo via Salida: 183
Pueblo via I-25 Walsenburg: 127
Saguache via Center: 65
Salida: 91
San Luis: 45
Santa Fe: 184
South Fork: 72
Taos: 113
Trinidad: 115
Walsenburg: 78
Westcliffe via Medano Pass: 44
Wolf Creek Pass Summit: 92