Great Sand Dunes Guide: Best Hikes, When to Visit & Where to Stay

Great Sand Dunes National Park and Preserve in southern Colorado's San Luis Valley contains the tallest sand dunes in North America. Star Dune, the highest, rises approximately 755 feet from base to crest -- taller than many skyscrapers and nearly as tall as the dunes of the Sahara. The dune field covers roughly 30 square miles at the base of the Sangre de Cristo Mountains, and the visual juxtaposition is startling: golden sand dunes that look as though they belong in the Arabian Peninsula, backed by 13,000-foot peaks capped with snow. The landscape is so improbable that first-time visitors often stop the car in disbelief.

The dunes formed over hundreds of thousands of years as prevailing southwesterly winds carried sand from the Rio Grande flood plain and the dry bed of ancient Lake Alamosa into this natural pocket at the foot of the Sangre de Cristos. The mountains act as a wall, and opposing wind patterns recirculate the sand, building the dunes ever higher rather than allowing them to drift through the passes. Medano Creek, a seasonal stream that flows along the eastern edge of the dune field in spring and early summer, adds to the surreal character of the place -- a beach at 8,200 feet elevation, with children splashing in the shallow water while dunes loom overhead. The park and preserve together encompass 150,000 acres, including not only the dune field but also grasslands, wetlands, subalpine forests, alpine tundra, and several peaks above 13,000 feet.

Best Hikes

High Dune -- There are no marked trails on the dunes, but the most popular route heads directly from the main parking area across Medano Creek (when flowing) to the first ridge of the dune field, known as High Dune. The round trip is approximately 2.5 miles with 650 feet of elevation gain. Walking in sand is strenuous -- expect the effort to feel roughly twice as hard as the same distance on a firm trail. The views from High Dune encompass the entire dune field, the San Luis Valley, and the Sangre de Cristos. Difficulty: moderate to strenuous (due to sand). Allow 2-3 hours.

Star Dune -- For those who want to reach the tallest dune, the round trip from the parking area is approximately 7 miles with 755 feet of elevation gain. The route crosses High Dune and continues deeper into the dune field. There is no trail -- navigation is by visual landmarks (Star Dune is the obviously tallest formation to the southwest). The deep sand makes this a genuinely exhausting hike. Bring abundant water. Difficulty: strenuous. Allow 5-7 hours.

Mosca Pass Trail -- A 7-mile round trip trail that climbs 1,400 feet from the Montville trailhead through montane forest to Mosca Pass (9,700 feet) on the crest of the Sangre de Cristos. The trail follows the historic toll road route through stands of aspen and conifer with occasional views of the dunes below. Wildflowers are abundant in midsummer. Difficulty: moderate. Allow 4-5 hours.

Sand Ramp Trail -- This 11-mile round trip trail skirts the northern edge of the dune field through the sand ramp ecosystem, where sand transitions into grassland and forest. The trail is relatively flat, gaining only about 500 feet, and offers unique perspectives of the dunes from the side. It connects to the Little Medano Creek area and backcountry camping zones. Difficulty: moderate (due to length). Allow 5-6 hours.

Music Pass Trail -- Starting from a 4WD trailhead (or add 3 miles each way from the 2WD parking area), this trail climbs approximately 2 miles and 1,100 feet to Music Pass (11,380 feet), the gateway to the remote Upper Sand Creek Lakes basin. The alpine meadows and views of the Wet Mountains and Sangre de Cristos from the pass are spectacular. Difficulty: moderate to strenuous. Allow 3-4 hours to the pass.

Medano Lake Trail -- An 8-mile round trip trail (using the 4WD road portion) that climbs 2,000 feet to a stunning alpine lake at 11,500 feet, nestled beneath the sheer face of Mount Herard (13,345 feet). The trail passes through subalpine forest and opens into alpine tundra. Snow lingers at the lake well into July. Difficulty: strenuous. Allow 6-8 hours.

When to Visit

Late May-June -- This is the premier time to visit. Medano Creek reaches its peak flow in late May and early June as snowmelt from the mountains feeds the stream. The creek creates a "beach" experience at the base of the dunes that is unique in the national park system. The phenomenon of "surge flow" -- rhythmic waves that pulse down the creek -- occurs during peak runoff and fascinates visitors. Temperatures are pleasant (highs in the 70s), and the high-elevation trails begin opening.

July-August -- Summer is busy. Sand surface temperatures can exceed 150 degrees Fahrenheit on sunny afternoons, making barefoot walking impossible. Hike the dunes early in the morning or in the evening. Afternoon thunderstorms are common and lightning on the exposed dunes is extremely dangerous -- if thunder is heard or clouds are building, descend immediately. Medano Creek typically dries up by late July.

September-October -- Fall brings cooler temperatures, smaller crowds, and golden aspens in the mountains. The sand is cool enough for comfortable walking. Fall is excellent for dune hiking and for exploring the mountain trails at their most colorful.

November-April -- Winter transforms the dunes with snow, creating a stark and beautiful landscape. The dunes can be hiked year-round, though cold winds and icy conditions on the sand surface are common. Snowshoeing and cross-country skiing are popular in the park. The visitor center has reduced hours, and the road beyond the main parking area may be closed.

Where to Stay

Alamosa, Colorado -- The largest town in the San Luis Valley, approximately 35 miles southwest of the park. Alamosa offers chain hotels, motels, and restaurants. It also serves as the base for visiting the Alamosa National Wildlife Refuge and the historic Cumbres and Toltec Scenic Railroad.

Great Sand Dunes Lodge -- A privately operated lodge located just outside the park entrance, offering motel-style rooms with views of the dunes and mountains. It has an indoor pool and is the most convenient lodging option. Rates are approximately $150-$250 per night.

Zapata Ranch -- A working bison ranch adjacent to the park, operated by The Nature Conservancy, that offers lodging, meals, horseback riding, and ranch activities. The experience combines luxury ranch hospitality with conservation education. Rates are all-inclusive and premium.

Pinon Flats Campground -- The park's only developed campground, with 88 sites available by reservation through Recreation.gov ($20/night). The campground is set among pinyon pines with views of the dunes. It has flush toilets and drinking water. Sites with electrical hookups are available for RVs. Reservations are essential for weekends and peak season.

Backcountry Camping -- Free backcountry camping permits are available at the visitor center for camping in the dune field and the surrounding wilderness. Camping in the dunes, surrounded by sand ridges under a star-filled sky, is an unforgettable experience.

Getting There

By Air -- Denver International Airport (DEN) is the nearest major airport, approximately 230 miles and 4 hours from the park. Colorado Springs Airport (COS) is about 170 miles and 3 hours away. San Luis Valley Regional Airport in Alamosa has limited commercial service.

By Car from Denver -- Take I-25 south to Walsenburg, then US-160 west to Fort Garland, then Highway 150 north to the park entrance. Approximately 230 miles and 4 hours.

By Car from Colorado Springs -- Take I-25 south to Walsenburg, then US-160 west to Highway 150. Approximately 170 miles and 3 hours.

By Car from Albuquerque -- Take I-25 north to Walsenburg (or I-25 to US-285 north through the San Luis Valley), then US-160 west and Highway 150 north. Approximately 280 miles and 4.5 hours.

Essential Tips

Sand temperatures can exceed 150 degrees Fahrenheit on summer afternoons. If you plan to walk barefoot on the dunes (which many visitors do at the base), go in the morning or evening when the sand is cool. Consider sand-appropriate footwear for longer dune hikes.

Lightning is the greatest danger on the dunes. The open, elevated dune field with no shelter makes hikers extremely vulnerable during thunderstorms. Check the forecast, start early, and plan to be off the dunes by early afternoon in summer. If caught in a storm, descend to the lowest point you can reach and crouch low.

Entrance fees are $25 per vehicle for a 7-day pass. The America the Beautiful Annual Pass ($80) is accepted.

Sandboarding and sand sledding are permitted on the dunes. Specialty sandboards and sand sleds can be rented from shops in the area. Waxing the board is essential -- the sand at Great Sand Dunes is coarser than beach sand, and unwaxed boards will not slide.

Carry abundant water when hiking the dunes. There is no shade, no water, and the effort of walking in sand accelerates dehydration. One liter per person per hour is a reasonable minimum for dune hiking.

4WD access along the Medano Pass Primitive Road (open seasonally) provides access to backcountry trailheads and camping areas along Medano Creek. The road is deep sand in places and requires high-clearance 4WD. Air down your tires.

Nearby Attractions

Zapata Falls -- A short 0.5-mile hike (accessed via a rough dirt road about 5 miles south of the park) leads to a 30-foot waterfall hidden inside a narrow rock grotto. The trail involves walking through cold, shallow water in the final stretch. Views of the San Luis Valley from the road are excellent.

Alamosa National Wildlife Refuge -- Located along the Rio Grande near Alamosa, this refuge protects wetlands that support thousands of migratory birds, including sandhill cranes and whooping cranes during spring and fall migration.

Cumbres and Toltec Scenic Railroad -- A historic narrow-gauge steam railroad that runs 64 miles between Antonito, Colorado, and Chama, New Mexico, through the dramatic Toltec Gorge and over Cumbres Pass. The ride is one of the finest scenic rail experiences in the country.

San Luis, Colorado -- The oldest town in Colorado (founded 1851), about 45 miles south of the park. The town features a beautiful Stations of the Cross shrine on a mesa above town and the Sangre de Cristo Parish Church, one of the oldest churches in the state.