Great Sand Dunes & Stargazing
Private Guided Tour from Denver · Southern Colorado
750 Feet of Sand. 14,000-Foot Peaks. Zero Light Pollution.
Great Sand Dunes National Park sits about three hours south of Denver in the San Luis Valley. The dunes are the tallest in North America, 750 feet, backed by the Sangre de Cristo range. Most people don't know it's there. This two-day tour covers the dunes plus the valley's strangest and best stops: a gator farm running on geothermal water at 7,500 feet, a UFO watchtower with 110+ reported sightings, and Zapata Falls, a waterfall tucked inside a rock slot you have to wade through to reach.
We time the drive so you're on the dunes at sunset and back out after dark for stargazing — the park has gold-tier International Dark Sky certification, meaning the Milky Way is visible without a telescope. Morning is for sunrise on the sand and an optional hike up High Dune before heading to Zapata Falls and home.
750-Foot Dunes
Tallest in North America. No trails, no boardwalks — you walk straight onto open sand.
Dark Sky Park
Gold-tier Dark Sky certification. You can see the Milky Way without binoculars.
Colorado Gators
400+ alligators living in geothermal water at 7,500 feet elevation. Yes, really.
UFO Watchtower
110+ reported sightings from this San Luis Valley observation deck. Make of that what you will.
Zapata Falls
Short hike to a waterfall inside a rock slot. You wade through a creek to get there, bring water shoes.
Sunrise on Sand
Early morning is when the dunes look their best. Low light, long shadows, nobody else around.
Day 1: Denver → San Luis Valley → Dunes at Sunset
| Time | Stop | Duration |
|---|---|---|
| 8:00 AM | Depart Downtown Denver, champagne & charcuterie on board | |
| 9:30 AM | US-285 through Kenosha Pass — big views of the South Park basin from the road | — |
| 11:00 AM | Lunch in Salida, small downtown on the Arkansas River, good local restaurants | 60 min |
| 12:30 PM | Colorado Gators Reptile Park—gator farm heated by geothermal water at 7,500 ft | 60 min |
| 2:00 PM | UFO Watchtower—observation deck, gift shop, and a lot of stories | 30 min |
| 3:00 PM | Arrive at Great Sand Dunes National Park — Visitor Center, get oriented | 30 min |
| 3:30 PM | Check in at Great Sand Dunes Lodge (right at park entrance) | — |
| 4:30 PM | Walk onto the dunes for sunset: the sand cools off and the light gets good | 2–3 hrs |
| 9:00 PM+ | Stargazing: Dark Sky certified park, Milky Way visible without a telescope. Bring a blanket. | |
| Day 2: Sunrise → Zapata Falls → Denver | ||
| Sunrise | Sunrise on the dunes — worth the early alarm. Optional hike to High Dune (1.5 mi, moderate) | 2 hrs |
| 9:00 AM | Medano Creek—shallow creek at the base of the dunes, seasonal (best late May – June). Good place to cool off. | 30 min |
| 10:00 AM | Zapata Falls0.7 mi hike to a waterfall inside a rock slot. Wear water shoes, you'll wade through a creek. | 60 min |
| 11:30 AM | Depart, scenic return via Poncha Pass & US-285 through South Park | |
| 2:30 PM | Return to Downtown Denver | — |
Full Arion Signature Amenity Package (both days) + national park entrance fee ($25/vehicle) + all fuel, tolls, parking, and driver overnight accommodation. Guest lodging at Great Sand Dunes Lodge is not included—we help coordinate your reservation.
Right at the park entrance. Rooms run about $120–160/night in peak summer. Guest books and pays for their own room. We handle the timing and can help with room preferences. Other options: Oasis Camping Cabins (rustic, at the park entrance) or hotels in Alamosa (~30 min, from $90/night).
Colorado Gators Reptile Park~$25/person. Geothermal-fed, open year-round.
UFO Watchtower~$5/person. Observation deck, memorial garden, gift shop.
Great Sand Dunes National Park — $25/vehicle (included). Everything inside is free.
Zapata Falls — Free. BLM land, no admission. Bring water shoes.
Amicas (Salida), Wood-fired pizza, craft beer, est. $20–35/person
Patio Pancake Place (Alamosa), Local breakfast institution, est. $12–18/person
Great Sand Dunes Oasis Restaurant — At the park entrance, casual dining, est. $15–25/person
Best months: May through early October.
Medano Creek: Flows late May through early June in average snow years. It creates "surge flow" waves — basically a natural beach at 8,200 feet.
Stargazing tip: New moon weekends give the darkest skies. We check the lunar calendar and help you pick the right dates. August and September are best for the Milky Way.
Heat advisory: Sand surface temps can hit 150°F on summer afternoons. We schedule the dune walk for late afternoon when the sand cools down.
Per Person, All-Inclusive
| Guests | Per Person | Total |
|---|---|---|
| 3 | $799 | $2,397 |
| 4 | $649 | $2,596 |
| 5 | $549 | $2,745 |
| 6 | $499 | $2,994 |
| Guests | Per Person | Total |
|---|---|---|
| 6 | $549 | $3,294 |
| 8 | $449 | $3,592 |
| 10 | $375 | $3,750 |
| 12 | $335 | $4,020 |
20% gratuity suggested, not included. Pricing includes all amenities, fuel, tolls, park entrance, and parking. Guest lodging at Great Sand Dunes Lodge is additional (approx. $120–160/night).
Book This Tour
Send us your dates and group size. We'll get back to you with a quote, usually within a few hours.
Request This TourLast reviewed: August 15, 2026 by Arion dispatch. Rates, policies and Colorado Department of Transportation rules are subject to change; call (970) 703-4995 for current details.