Great Sand Dunes National Park: The Complete Visitor Guide

Great Sand Dunes National Park protects the tallest sand dunes in North America. Star Dune rises 741 feet from base to crest. High Dune tops out at 699 feet. The dunefield itself covers about 30 square miles and sits against the western face of the Sangre de Cristo Range in the San Luis Valley of southern Colorado. The park was upgraded from a national monument to a National Park and Preserve in 2004 and draws about 600,000 visitors per year, modest numbers for a National Park that looks this strange from the road.

The experience is unlike anywhere else in the state. There are no marked trails on the dunes. You walk up, down, and across an enormous pile of sand backed by 13,000-foot peaks, and in late spring a wide, shallow creek runs along the dune base and turns the entry area into a beach. This guide covers what you need to plan a real trip: how to get there, where to hike, when to come, and how to avoid the mistakes that send people back to the car with second-degree burns on their feet.

What You'll Learn

• Quick stats at a glance
• Where the park is and how to get there
• Hiking the dunes: the signature experience
• The top hikes in the park
• Medano Creek and the spring beach scene
• Sandboarding and sand sledding
• When to visit
• Sand temperature warning
• What to bring
• Camping options
• Pairing with Zapata Falls
• Common mistakes visitors make
• Frequently asked questions

Quick stats at a glance

• Entrance fee: $25 per vehicle, valid 7 days. America the Beautiful pass accepted.
• Visitor center hours: 9 AM to 4:30 PM most of the year, 8:30 AM to 5 PM in summer
• Location: 11999 State Highway 150, Mosca, CO 81146
• Elevation at dunefield base: 8,200 ft
• Tallest dune: Star Dune, 741 ft (recently confirmed taller than High Dune)
• Park size: 149,028 acres (park and preserve combined)
• Dunefield size: About 30 square miles
• Best time of day: Sunrise or after 5 PM, almost always
• Dog policy: Allowed on the main dunefield (first ridge) and in the day-use area, leash required
• Drone policy: Prohibited in the National Park, allowed in parts of the Preserve

Where the park is and how to get there

Great Sand Dunes sits in the San Luis Valley in southern Colorado, roughly 35 miles northeast of Alamosa and a few minutes off Highway 150. The valley is broad, flat, and a long way from the Front Range, which is part of why the park stays quieter than Rocky Mountain National Park even on summer weekends.

From Denver (4 hours, 240 miles):

• I-25 south to Walsenburg
• US-160 west over La Veta Pass to Blanca
• Highway 150 north for 16 miles to the park entrance

From Colorado Springs (3 hours, 175 miles):

• I-25 south to Walsenburg, then west on US-160 as above

From Alamosa (35 minutes, 35 miles):

• US-160 east to Highway 150
• North on 150 to the entrance station

From Durango (3.5 hours, 165 miles):

• US-160 east the entire way through Wolf Creek Pass

The closest towns are Mosca (a gas station and the Oasis Store right at the park boundary) and Alamosa (the regional hub with full services, hospitals, and the airport that connects to Denver). Most visitors stage out of Alamosa or camp inside the park. For more on the area, see our hikes near Alamosa page.

Cell service is unreliable in the park itself. Download maps before you arrive.

Hiking the dunes: the signature experience

The defining feature of Great Sand Dunes, and the thing that catches first-time visitors off guard, is that there are no marked trails on the dunefield. The wind erases footprints daily. You park at the Dunes Parking Lot, cross Medano Creek (or its dry bed), and walk out onto 30 square miles of open sand. You pick a high point on the horizon, head for it, and find your own line up.

Navigation is by sight. From the parking lot, the closest tall ridge is High Dune, the one most visitors aim for first. Beyond it, Star Dune sits roughly a mile and a half deeper into the dunefield, hidden from the parking lot view. There are no signs, no cairns, and no path. You can walk in any direction across the dunes as long as you can find your way back.

This is also why the dunes are physically harder than the elevation profile suggests. Sand absorbs your step. For every foot up, you slide back a few inches. People in good hiking shape often find that climbing 700 feet of dune takes longer and burns more than climbing 700 feet of mountain trail.

The walk from the parking lot to the first ridgeline (a small dune crest with views back across the valley) takes about 20 minutes. The walk to High Dune takes 2 to 3 hours round trip. The walk to Star Dune takes 6 or more.

The top hikes in the park

High Dune (2.5 miles round trip, 700 ft of gain, 2-3 hours)

The most popular destination on the dunefield. High Dune is the tall, prominent ridge you can see from the parking lot, the obvious target. It's not technically the tallest dune in the park (Star Dune is taller by 42 feet) but it's the most visible from the entry area and a satisfying objective for a first visit.

The route: cross Medano Creek, head straight toward the high ridge on the horizon, and work your way up. Most people angle along ridgelines because walking on sloping sand is easier than walking straight up loose faces. Allow 2 to 3 hours round trip. There is no real trail, so add time for picking your line and stopping to catch your breath.

Star Dune (8 miles round trip, 1,000 ft of gain, 6+ hours)

The actual tallest dune in North America. Star Dune sits deeper in the dunefield, hidden behind several false summits. The route is essentially: hike to High Dune, then continue west and north into the heart of the dunefield following the highest ridgeline you can see. The total trip is 8 miles round trip with about 1,000 feet of cumulative elevation gain and a lot of secondary climbs and descents.

Plan 6 to 8 hours. Start before sunrise in summer; the sand will cook your feet by 10 AM. Bring 3+ liters of water, real food, and a way to find your route back to the car (GPS pin on the parking lot is the simplest insurance). This is a serious half-day commitment, not a casual stroll.

Sand Creek Lakes (10 miles round trip, 2,200 ft of gain, hard)

A backcountry route that leaves the dunefield and climbs into the Sangre de Cristo Wilderness on the park's eastern side. Reaches Lower Sand Creek Lake at 11,500 feet. This is a real alpine hike, not a sand walk, and requires a 4WD vehicle to reach the Sand Creek trailhead via the Medano Pass Primitive Road. For experienced backcountry hikers only.

Mosca Pass Trail (7 miles round trip, 1,500 ft of gain, moderate)

A historic wagon route that climbs from the Montville trailhead through the foothills to Mosca Pass at 9,737 feet on the Sangre de Cristo crest. Starts in pine forest, opens up to high meadows, and gives you the only east-side view of the dunefield from above. The trailhead is on the park road near the visitor center. About 4 to 5 hours. A good rainy-day or hot-day alternative when the dunes themselves are roasting.

For other Colorado trail picks at lower elevation, see our best hikes near Alamosa guide.

Medano Creek and the spring beach scene

Medano Creek is the seasonal creek that runs along the western edge of the dunefield, fed by snowmelt out of the Sangre de Cristos. From late April through June (peak in late May), the creek runs wide and shallow across a sand-bottomed channel. The combination of warm sand, cold flowing water, and a dramatic dune backdrop turns the entry area into something close to a beach in the middle of the Rockies.

The creek is famous for a hydrological quirk called "surge flow." Sand dams build up underwater, then collapse and release, sending small waves down the channel every 20 seconds or so. Kids love it. Families set up canopies and beach chairs along the bank.

Peak flow: late May to early June (varies by snowpack year).
Typical depth: ankle to thigh deep at peak flow.
By July: the creek is usually dry or down to a trickle.
By August: dry sand most years.

If a beach scene with kids is the trip you're planning, time your visit for Memorial Day weekend through mid-June. If you'd rather avoid crowds, come in September when the creek is gone but the dunes are quieter and the weather is cooler.

Sandboarding and sand sledding

You can sled or board down the dunes. The park itself doesn't rent equipment, but two reliable outfitters do:

Oasis Store (just outside the park entrance on Highway 150). Sandboards and sand sleds available for daily rental. Walk-up rentals; first-come, first-served. The closest option, perfect if you're already on your way in.

Kristi Mountain Sports (in Alamosa). Full outdoor shop with sandboard and sled rentals, slightly cheaper than the Oasis Store. Worth a detour if you're staying in town anyway.

A few notes that will save you frustration:

• Regular snow sleds, cardboard, and saucer sleds do not work. Sand has too much friction. You need a board or sled specifically waxed for sand.
• The boards and sleds come with bars of sled wax. Wax the bottom before every run.
• Dry sand is much faster than damp sand. Boarding after a rainstorm or in early morning when sand is damp from dew is slow.
• The walk back up is the hardest part. Pick a dune you can climb in 10 to 15 minutes if you want to get more than two runs in.

The dunes closest to the parking lot get the most sled traffic. For better runs and fewer people, walk 15 minutes deeper into the dunefield and pick a clean face.

When to visit

Each season at Great Sand Dunes is genuinely different. Pick based on what kind of trip you want.

Late April to mid-June: Medano Creek is flowing. Family beach scene. Sand temperatures are still mild. Wildflowers in the grasslands. This is peak season for a reason. Expect crowds Memorial Day weekend.

Mid-June to August: Summer. Sand temperatures hit 150°F+ in the afternoon. Medano Creek is mostly dry by July. Afternoon thunderstorms common. Dunes hiking requires a 5 AM start or a 6 PM start. Avoid mid-day on the sand.

September to October: The best month for serious dune hiking. Cool temperatures, no creek crowds, fall color in the cottonwoods and aspens around the foothills. Star Dune is achievable mid-day in September without burning your hands.

November to February: Winter. Yes, the dunes get snow, and a snow-dusted dunefield against the Sangres is one of the strangest sights in Colorado. The visitor center stays open. Crowds disappear. Dress for winter mountain conditions; the dunes hold cold air at the base.

March to early April: Variable. Mud season in the campground. Creek hasn't started flowing. Wind can be intense.

If you're in town any month other than midsummer, check our altitude sickness guide; the dunefield base is at 8,200 feet and that catches people off guard.