Great Sand Dunes National Park Nature Trail

Sangre de Cristo • Mosca, Colorado

easyloop

Miles

Elevation Gain (ft)

Hours

8,200

High Point (ft)

Overview

The nature trails at Great Sand Dunes National Park are the short interpretive loops near the visitor center: the Montville Nature Trail along Mosca Creek and the accessible Sand Sheet Loop across the grassland, about a mile of walking between them with the dune field and the Sangre de Cristo rising behind. They are the walk to take before or after the dunes themselves, which have no trails at all.

Trail Highlights

Tallest sand dunes

Wetland ecosystem

Mountain backdrop

Wildlife viewing

The Route

The Montville Nature Trail starts at the Mosca Pass trailhead lot just north of the visitor center and loops half a mile along Mosca Creek under cottonwood and pinyon, with numbered stops keyed to a guide from the visitor center and views out to the dunes through the trees. It is shaded, which matters here in July.

The Sand Sheet Loop starts at the visitor center and circles a quarter mile through the grassland and sage on a packed, accessible surface, with the whole dune field in view and interpretive signs on the plants and the sand. The Dunes Overlook trail from the Montville lot climbs 2.3 miles for a higher view, and the walk onto the dunes starts from the main dunes parking area a mile north.

Getting to the Trailhead

Great Sand Dunes is 35 miles northeast of Alamosa on US 160 and Colorado 150. The park entrance fee applies, paid at the entrance station or online; there is no timed-entry or reservation system, and the park is open 24 hours. The visitor center and the Montville lot are just inside the entrance, paved, with toilets and water at the visitor center. The lots fill by mid-morning in summer and on Medano Creek weekends in late May and June.

Best Time to Hike

The trails are open year-round, and spring and fall are the best times: cool mornings, Medano Creek flowing across the dunes from late May into June, and the cottonwoods yellow in October. Summer afternoons are hot, the sand reaches 150 degrees, and the storms come off the Sangres by early afternoon. Winter is cold and windy and the dunes are occasionally snow-covered, which is worth seeing.

🌸spring

☀️summer

🍂fall

Good to Know

Dogs are allowed on leash on these trails and on the dunes in the day-use area, with the sand temperature the reason to keep them off it after mid-morning in summer. The loops are flat and fine for any child and for wheelchairs on the Sand Sheet Loop. Carry water for the dunes; the trails are short. The park is a certified dark-sky park and the night sky is the second show. Alamosa has the services. The Alamosa hikes page has Zapata Falls, 10 minutes south, for the same day.

Sources

Figures and access details on this page were checked against these pages on 2026-09-04. Conditions change; confirm with the managing agency before you go.

Who to call

Conditions, closures, permits, and anything left behind on Great Sand Dunes National Park Nature Trail.

Managed by: Great Sand Dunes National Park and Preserve, National Park Service
(719) 378-6395 (Mosca) · website
Lost and found, non-emergency: Alamosa County Sheriff's Office
(719) 589-5807 · website
Emergency: 911. Cell coverage is patchy on most of these trails; a text to 911 can get through where a call cannot.

Numbers checked 2026-10-04. Colorado United is an independent guide, not the land manager; wallets, keys, and dogs found on the trail go to the offices above.

What to Pack

Gear guides for this kind of hike:

Frequently Asked Questions

How long does the Great Sand Dunes National Park Nature Trail take?

Most hikers finish the 1-mile route in about 1 hour, plus stops. Allow extra time at altitude and for photos.

How hard is the Great Sand Dunes National Park Nature Trail?

It is rated easy, with 50 feet of gain over 1 miles and a high point of 8,200 feet. It suits most hikers in reasonable shape.

Is the Great Sand Dunes National Park Nature Trail dog-friendly?

Yes, leashed dogs are allowed. Pack water for them and clean up after them.

When is the best time to hike the Great Sand Dunes National Park Nature Trail?

The best seasons are spring, summer, and fall. Start early to beat both the crowds and Colorado's afternoon thunderstorms.

Do I need a pass or permit for the Great Sand Dunes National Park Nature Trail?

You need a National Park entrance pass, and many park trailheads also require a timed-entry reservation in peak season. Check the park website before you drive out.