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Status update, October 20, 2026.
- Medano Creek was very low in 2026. The NPS calls the 2026 water year one of the driest on record. The creek didn't reach the main Dunes Parking Lot, and water could only be found upstream (NPS).
- Fee-free days left in 2026: US citizens and residents get in free on October 27 and November 11 (NPS).
- Nights get cold at 8,200 feet in fall and winter. The park's outdoor areas stay open 24 hours.
Why go
The dunefield sits against the Sangre de Cristo Mountains in the San Luis Valley, and its tallest dunes are the highest in North America. The NPS lists Star Dune at 741 feet from base to summit, tied with Hidden Dune. Recent reporting suggests Star Dune has shrunk to about 720 feet. (NPS, Hoodline) There are no trails on the sand. You pick a ridge and climb it. The park is also an International Dark Sky Park, and its outdoor areas are open around the clock, so you can stargaze from the dunes at night.
Fees and passes
You don't need a timed entry or reservation to visit. These are the entrance fees listed by the NPS for 2026, which can change:
| Pass | Price |
|---|---|
| Private vehicle (7 days) | $25 |
| Motorcycle (7 days) | $20 |
| Per person on foot or bike, age 16+ | $15 |
| Great Sand Dunes annual pass | $45 |
America the Beautiful passes are accepted. Colorado's Keep Colorado Wild Pass covers state parks only and doesn't get you in. The entrance station takes cards only, and you can also buy a pass ahead of time on Recreation.gov. (NPS fees)
Getting there
The NPS gives these driving distances to the visitor center (NPS directions):
- Denver: 234 miles via US 285, or 242 miles via I-25 and Walsenburg. Most people take about four hours.
- Colorado Springs: 167 miles via I-25 and Walsenburg.
- Alamosa: 37 miles. Mosca, the closest town, is 23 miles away.
The I-25 route goes south to Walsenburg, west on US 160, then north on CO 150. The US 285 route crosses the mountains and is about the same distance. The NPS warns against relying on phone navigation in this area. Mapping apps have sent visitors onto 4WD tracks and hiking trails. Stick to the paved highways (CO 150 from the south, or County Lane 6 from Mosca).
Alamosa has a small commercial airport 38 miles from the park, and Denver and Colorado Springs have far more flights and rental cars. If you're flying into the Springs, see our COS car rental guide.
Medano Creek
In an average year, Medano Creek flows past the main Dunes Parking Lot for only a few weeks in late spring, roughly mid-May to early June. That's when families splash in the shallow water at the base of the dunes. By July it has usually pulled back toward the mountains. Through late summer a thin flow often continues along the eastern edge of the dunefield near Castle Creek, which you can reach with a high-clearance 4WD on the Medano Pass Primitive Road or by hiking up the creekbed.
2026 was an exception: the creek sank into the sand upstream of the main parking area. The NPS said visitors without 4x4s could park at the horse trailer lot at the start of Medano Pass Road and hike about a mile upstream to reach water. On the Medano Pass road, the park says AWD and 2WD vehicles aren't allowed, and you need a high-clearance 4x4 with a low-range setting. Check the Medano Creek page before you plan a creek day.
Sandboarding and sledding
You can't rent boards or sleds inside the park, so rent them on the way in. The NPS keeps a list of outside rental shops at go.nps.gov/GRSA_Sandboarding. Keep closed-toe shoes with you, because the walk back up can be over very hot sand.
When to go
- Late May to early June: the best chance of Medano Creek at the main lot in a normal year, though mosquitoes are around too.
- July and August: the warmest months, with average highs in the low 80s°F. The sand surface gets much hotter than the air, so climb early or late. Afternoon lightning is common.
- September and October: mild days, few bugs and fall color in the mountains behind the dunes. It's one of the most comfortable times to visit.
- Winter: cold, quiet and sometimes snow on the dunes. Fees are collected at the visitor center when the entrance station is closed.
Tips and rules
- Wear closed-toe shoes. The NPS warns that daytime sand temperatures can burn bare feet.
- Bring food and plenty of water. The visitor center bookstore sells a few snacks, and that's the only food in the park.
- Drones aren't allowed. Leashed pets are welcome in most popular areas.
- Leave everything where it is. Collecting sand, rocks, antlers or plants isn't allowed.
- Go easy on the altitude. The park sits around 8,200 feet, and climbing dunes at that height is tiring.
- Camping or sleeping in your vehicle requires a permit or a reservation at a designated site.
Tours and nearby stops
Few guided tours run here from Denver, so plan to drive, or check the listings on Viator and GetYourGuide above for current options and what's included. Self-guided GPS audio tours also exist. On a road trip, you can stop in Colorado Springs (Garden of the Gods and Pikes Peak) on the way south. With more time, keep going west to Durango for the Durango & Silverton train. Durango is 189 miles from the dunes visitor center.
Frequently asked questions
Do you need a reservation for Great Sand Dunes National Park?
No. There's no timed entry or reservation for day visits. You pay the entrance fee, which is $25 per private vehicle for 7 days according to the NPS in 2026. Camping does require a reservation or permit.
How far is Great Sand Dunes from Denver?
The NPS lists 234 miles via US 285 and 242 miles via I-25 and Walsenburg. Most people take about four hours.
When does Medano Creek flow?
In an average year it flows past the main Dunes Parking Lot for a few weeks from mid-May to early June. In 2026 snowpack was very low and the creek didn't reach the main parking area.
Can you rent sandboards at Great Sand Dunes?
Not inside the park. Rent sandboards or sand sleds from shops outside the park on your way in. The NPS keeps a list.
How tall are the dunes?
The NPS lists Star Dune at 741 feet, tied with Hidden Dune as the tallest in North America, though recent measurements suggest Star Dune has shrunk to about 720 feet.
Sources are linked in the text. We check them when we update the page, but rules, dates and prices change, so confirm with the official source before you go.