Alamosa, Colorado

Gateway to the Great Sand Dunes

Your Guide to Alamosa

Sand dunes, high desert, and San Luis Valley

Alamosa is the hub of the San Luis Valley, a vast high-desert basin ringed by mountains. The town serves as the gateway to Great Sand Dunes National Park, where North America's tallest dunes rise against the Sangre de Cristo Mountains—one of Colorado's most surreal landscapes.

Adams State University gives the town a college-town feel. The Rio Grande runs through the valley, supporting wildlife refuges and wetlands in this otherwise arid landscape. The valley floor sits at 7,500 feet with surprisingly extreme temperatures.

Alamosa isn't a tourist town—it's a working agricultural community that happens to be near a spectacular national park. Services are basic but adequate. The real draw is the landscape: dunes, mountains, wetlands, and wide-open high desert.

Explore Alamosa

Dunes, wildlife, and high desert

DUNES

Great Sand Dunes

North America's tallest dunes rising 750 feet. Hike, sandboard, or splash in Medano Creek. 30 miles from Alamosa.

WILD

Wildlife Refuges

Alamosa and Monte Vista refuges host thousands of sandhill cranes in spring and fall. Wetland habitat in high desert.

GATOR

Colorado Gators

Quirky reptile park with alligators in Colorado. Geothermal-heated water allows tropical species to survive at 7,500 feet.

TRAIN

Rio Grande Railroad

Historic depot and railroad history. The valley was a major transportation corridor for the Denver & Rio Grande.

SPRINGS

Hot Springs

Sand Dunes Swimming Pool and nearby hot springs use geothermal water. Unique high-desert soaking.

STARS

Dark Skies

Great Sand Dunes is an International Dark Sky Park. Remote location means exceptional stargazing.

Frequently Asked Questions

Planning your Alamosa visit

How far is Alamosa from Denver?

About 230 miles, roughly 4 hours via I-25 and Highway 160 over La Veta Pass. Alternatively, Highway 285 through South Park.

When is the best time to visit the sand dunes?

Late May to early June for Medano Creek at peak flow. Summer mornings before the sand heats up. Fall for fewer crowds. The dunes are accessible year-round.

When do the cranes come through?

Sandhill cranes peak in mid-March and October. Thousands rest in the valley during migration. The Monte Vista Crane Festival is held each March.

Why are there alligators in Colorado?

Colorado Gators uses geothermal water from a tilapia farm to heat pools for rescued alligators. It's quirky, educational, and genuinely strange—in a good way.

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