Great Sand Dunes · September
Great Sand Dunes in September
September is a good time to visit Great Sand Dunes — quieter than August, busier than October.
Expect moderate crowds (6/10) and about 12.4 hours of daylight.
Crowd score
How busy it gets
A comfortable middle ground: some company on popular trails, but no gridlock.
About 54% of this park's busiest month.
Source: NPS Visitor Use Statistics, 2023–2025
Data: NPS visitation 2023–2025 · crowd scores computed Oct 2026 · alerts checked Oct 18, 2026. How this is calculated →
Computed from federal data · Methodology by Sharon Ben-Moshe
Visitation
Typical September visits vs. the year
September draws about 10% of Great Sand Dunes’s yearly visitors.
Typical monthly recreation visits, averaged over the most recent three full years.
Source: NPS Visitor Use Statistics, 2023–2025
Weather
September weather
- Avg high
- —
- Avg low
- —
- Precipitation
- 1.4"
- Sunrise
- 5:44 AM
- Sunset
- 6:09 PM
- Daylight
- 12.4h
Source: NOAA 1991–2020 climate normals, GREAT SAND DUNES 7.0 SSW, CO US
What's open
Great Sand Dunes in September: access
The park and preserve are open 24/7 all year
No seasonal road or area closures reported for this park.
Source: NPS Data API
Conditions
Current alerts
- Information
Piñon Flats Campground, sites can be reserved 3 months in advance for 2026
Due to the need for improvements in Piñon Flats Campground, sites can be reserved 3 months in advance beginning in 2026.
- Information
Sand Board and Sand Sled Rentals Not Available In Park.
Sand boarding and sand sled rentals are located in local communities surrounding the park. Visitors are encouraged to arrange rentals BEFORE coming to the park.
Details on nps.gov → - Caution
Speed Limits are Much Lower Inside Park than Surrounding Highways
Speed limits for the park include 30 MPH near the park boundary and Great Sand Dunes Sign, and as low as 10 MPH near the Headquarters and Entrance Station. Speed limits are in place to protect park visitors, pedestrians, and wildlife in the park. Please drive carefully and responsibly.
- Information
Great Sand Dunes Currently at Stage 1 Fire Restrictions
As of August 18th, Great Sand Dunes is under Stage 1 Fire Restrictions. All wood and charcoal fires must be in established fire rings in designated campsites or picnic sites. No other open fires are allowed. Fires MUST BE put out COLD before leaving your site and must not be left unattended. camp stoves and other pressurized gas devices allowed.
- Caution
Creek Crossings 3, 4, and 5 Have Deep Water on the Medano Pass Primitive Rd
Update 10-16-2026: The third, fourth, and fifth creek crossings on the 4WD Only Medano Pass Primitive Road have deep water crossings. Motorists are advised to use caution and exercise sound judgement to the capabilities of their vehicle. NOTE: Access remains unaffected for all other paved road destinations such as the visitor center, dunes parking lot, and campground.
Details on nps.gov →
Source: NPS Data API
Context
Great Sand Dunes crowds across the year
Alternatives
Quieter nearby in September
FAQ
Great Sand Dunes in September
How busy is Great Sand Dunes in September?
September rates 6/10 for crowds (Moderate) at Great Sand Dunes National Park & Preserve — about 54% of its busiest month. Typical recreation visits: 47,005.
What is the weather like at Great Sand Dunes in September?
In September, Great Sand Dunes averages a high of 0°F and a low of 0°F, with about 1.4 inches of precipitation.
How much does it cost to visit Great Sand Dunes?
Entrance to Great Sand Dunes costs $25 (Fees are charged only when the entrance station is open in the spring, summer, and fall seasons or when the visitor center is open in the winter season. Fees can be paid by cash, check, or credit card. Passes may also be purchased in advance online through recreation.gov .).
When is Great Sand Dunes least crowded?
Great Sand Dunes is quietest in January and February. If your dates are flexible, those months bring the thinnest crowds of the year.
How many hours of daylight does Great Sand Dunes get in September?
In mid-September, Great Sand Dunes gets about 12.4 hours of daylight, with sunrise around 5:44 AM and sunset around 6:09 PM.