Quick Info
Location: 30 miles from Alamosa. Dune height: Up to 750 feet (tallest in North America). Best time: Late May-June for Medano Creek. Entry fee: $25 per vehicle. Time needed: Half day minimum, full day recommended.
Great Sand Dunes National Park contains the tallest dunes in North America, rising dramatically against the backdrop of the Sangre de Cristo Mountains. The dunes formed over thousands of years as wind deposited sand from the San Luis Valley floor against the mountain range.
The landscape feels otherworldly—massive sand dunes in a high-altitude valley (8,200 feet), with snowcapped peaks behind them. It's unlike anywhere else in Colorado or the country.
Hiking the Dunes
High Dune
The most popular destination. About 2.5 miles round trip and 650 feet of elevation gain. No trail—just head up. Takes 2-3 hours for most hikers.
Tips: Start early to avoid hot sand. Bring more water than you think. The loose sand makes climbing difficult—two steps forward, one step back.
Star Dune
The tallest dune at 750 feet. About 5 miles round trip. More challenging and less crowded than High Dune. Plan half a day.
Dunes Field
You don't have to summit anything. Walking into the dunes even a short distance is memorable. Young children and those with mobility challenges can still experience the landscape.
Medano Creek
In late spring, snowmelt creates a seasonal creek at the base of the dunes. It's a beach experience at 8,000 feet—kids splash, adults wade, everyone enjoys the surreal setting.
Peak flow: Late May to early June, depending on snowpack. By late summer, the creek often dries up completely.
Surge flow: The creek exhibits "surge flow"—waves that pulse through the shallow water. A unique phenomenon caused by underwater sand dams.
Sandboarding & Sand Sledding
Rent boards or sleds in Alamosa before visiting. The dunes offer excellent terrain for sliding, though you'll have to hike back up after each run.
Best conditions: Cool, damp sand slides better than hot, dry sand. Morning runs are faster.
Rental shops: Several outfitters in Alamosa rent sandboards and sleds. The park doesn't rent equipment.
When to Visit
Late May-June: Best for Medano Creek. Water is flowing, temperatures are moderate. Most crowded.
Summer: Sand can exceed 150°F by afternoon. Visit early morning or evening only. Bring footwear for crossing to the dunes.
Fall: Fewer crowds, comfortable temperatures. No creek water but excellent hiking conditions.
Winter: Dunes are accessible year-round. Snow on dunes creates unique photography. Cold but uncrowded.
Tips
Start early. Sand heats rapidly after sunrise. Morning visits are cooler and less crowded.
Bring plenty of water. The altitude, sun, and exertion combine for serious dehydration risk. More than you think you need.
Protect your feet. Hot sand burns. Bring sandals or shoes for the initial crossing, even if you go barefoot on cooler mornings.
Prepare for wind. The dunes are created by wind, and it can blow hard. Secure belongings and bring eye protection.
Stay for sunset. The dunes transform in golden light. One of Colorado's most photogenic locations at dusk.
Frequently Asked Questions
How long does it take to climb the dunes?
High Dune takes most people 2-3 hours round trip. Star Dune is 4-5 hours. The loose sand makes it harder than it looks.
Can I camp at the dunes?
Yes—Pinon Flats Campground is inside the park. Reservations recommended in summer. Backcountry camping is also allowed with a free permit.
Is Medano Creek always flowing?
No—it's seasonal. Best flow is late May to early June. By late summer it often dries up. Check current conditions before visiting if the creek is your priority.
Are dogs allowed?
Dogs are allowed on the dunes but must be leashed. Hot sand can burn paws—booties recommended in summer.
What about altitude?
The dunes are at 8,200 feet. If you're not acclimated, take it slow. The combination of altitude and exertion can cause problems.