Best Time to Visit Great Sand Dunes National Park

Pick a month. Best months are in bold.

The best months to visit Great Sand Dunes National Park are March, April and October — computed from official NPS visitation (2021–2025 average), NOAA weather normals and daylight. June is the crowd peak (94,559 monthly visits); January is quietest at 6% of peak.

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Best months for fewer crowds

The quietest months at Great Sand Dunes, leaving out harsh weather and months when main access is typically closed.

Monthly crowd curve

Average monthly recreation visits, 2021–2025 (NPS Visitor Use Statistics). Amber bar = current month.

Great Sand Dunes month by month

Crowds: NPS Visitor Use Statistics, mean of 2021–2025 (2020 excluded as a COVID-19 anomaly). Weather: NOAA 1991–2020 monthly normals, station GREAT SAND DUNES NP & PRESERVE, CO US (7 mi from park coordinates). Daylight: computed for the 15th of each month at the park's location. Methodology.

How many people visit Great Sand Dunes each year

Great Sand Dunes National Park had 432,498 recreation visits in 2025, 1% fewer than 2024 (NPS Visitor Use Statistics). The busiest year since 2015 was 2021, with 602,613. Over 2021–2025 it averaged 495,685 visits a year, which makes it the 22nd least-visited of the 63 national parks.

Calendar-year recreation visits as published by NPS Visitor Use Statistics. 2020 is shown here but left out of the monthly averages above, because the COVID-19 pandemic makes it unrepresentative. See how every park compares: all 63 parks ranked by visits.

What to pack for Great Sand Dunes in March

Computed from March's weather normals — Great Sand Dunes's best month above. Visiting another month? Each month page has its own weather-computed list.

• Insulated jacket, beanie and gloves — nights average 24°F, below freezing
• Traction devices (microspikes) and gaiters — 9″ normal snowfall (compare other options)
• Insulated, waterproof boots — plus navigation and a basic first-aid kit — 9″ of snow is normal this month

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Common questions

Great Sand Dunes month by month: notes from the park service

• January: January is usually Great Sand Dunes' coldest month, the park says, with highs from the teens to low 30s°F and lows from single digits to below zero. Most days are still sunny and calm, and roads are cleared quickly.
• February: February at Great Sand Dunes is winter day-trip season: Piñon Flats Campground is closed from November through March, and vehicle camping is not allowed anywhere in the park or preserve until it reopens in April. Rangers staff the visitor center every day of the year, closing at 4:30 in the afternoon, so it is the place to check snow and road conditions before heading out.
• March: March is the snowiest month at Great Sand Dunes and the most volatile: calm sunny mornings, high-wind afternoons, and the odd blizzard, so the park suggests seeing the dunes in the morning. Sandhill cranes peak in the San Luis Valley around the first week of March.
• April: April is when Great Sand Dunes' camping season starts: Piñon Flats Campground is open from April through October, and vehicle camping in the park becomes possible again after the November-to-March ban. The visitor center keeps its year-round hours, 9 a.m. to 4:30 p.m.
• May: Late May is the average peak of Medano Creek, and the park says late May and early June are the best chance to see surge flow, waves up to about 20 inches running across the sand. Weekends then are extremely crowded, with traffic lines and full campgrounds, so come on a weekday.
• June: June averages 76°F by day and 45°F at night at Great Sand Dunes. Medano Creek falls through the month to about an inch deep by late June, and as it warms, mosquitoes emerge around the second week, for a season of four to seven weeks; the park suggests the open sand on the far side of the creek.
• July: July is the warmest month at Great Sand Dunes, with highs in the low 80s°F. Medano Creek dries up near the Dunes Parking Lot but keeps trickling along the eastern edge near Castle Creek Picnic Area.
• August: August at Great Sand Dunes averages highs in the upper 70s°F and lows in the upper 40s. In wet years millions of prairie sunflowers bloom in the dunes and grasslands, peaking in the last two weeks of August, and the mid-summer mosquitoes are gone.
• September: September has some of the best weather of the year at Great Sand Dunes, the park says, averaging 71°F by day and 42°F at night. Aspens turn gold through the month, starting at the highest elevations, and lower groves peak in late September to early October.
• October: October is the last month you can sleep in your vehicle at Great Sand Dunes: Piñon Flats Campground is open April through October, and from November to March vehicle camping is not allowed anywhere in the park or preserve. The Medano Pass Primitive Road also runs only from late spring through fall, conditions permitting, and needs a high-clearance four-wheel-drive vehicle.
• November: November at Great Sand Dunes is a day-trip month. Piñon Flats Campground has closed for the season (it opens again in April), and the park service does not allow vehicle camping in the park or preserve from November through March.
• December: December at Great Sand Dunes is a day-use month: Piñon Flats Campground is open only April through October, and the park service does not allow vehicle camping anywhere in the park or preserve from November through March. The visitor center keeps its year-round hours, 9 a.m. to 4:30 p.m., but closes on Christmas Day (and on Thanksgiving and New Year's Day).

Each month page carries the full note and the NPS page it comes from.

Dive into a month

Comparing parks for the same trip? See how Great Sand Dunes ranks against all 63 parks in March, April and October.

Last verified 2026-09-24 · all parks