This page features special events planned for 2023 at Great Sand Dunes. More events will be added as they are confirmed.

For the schedule of regular afternoon and evening programs, please visit our Ranger Programs page.

A silhouetted ranger gestures toward a large screen with an image of the dunes and night sky
A silhouetted ranger gestures toward an image of the dunes and Milky Way at the park amphithteater

NPS/Brady Richards

Saturday, April 22, 2023

Locals Night Under the Stars

Representatives from the International Dark Sky Association and San Luis Valley Great Outdoors will be present. Constellation tour, telescope viewing, program, and more - details to be announced soon!

A long exposure photo shows a line of visitors at the park amphitheater waiting to peer through a telescope. The scene is bathed in red light.
Visitors look through telescopes at the park amphitheater during an event in 2022. The scene is bathed in red light, due to only soft red lights being used to protect night vision.

NPS/Brady Richards

Friday, May 19 – Sunday, May 21, 2023
Alamosa National Wildlife Refuge (Friday)
Great Sand Dunes Amphitheater (Saturday evening and Sunday)

First Annual Sangre de Cristo Dark Sky Festival

Discover the dark skies and nocturnal ecology of the San Luis Valley in this first of what will be an annual event. Constellation tour, telescopes, and programs are being planned - details to be announced as they are confirmed.

Glowing galaxies are sprinkled across dark space
A glowing cluster of galaxies is visible in this image from the Hubble Space Telescope


Saturday, June 17, 2023
8:45 pm

Special Evening Program: Galaxy Clusters

with Guest Speaker Tobin Wainer

Tobin Wainer is an expert on galaxy clusters, groupings of galaxies in deep space. Learn more about this phenomenon at the park amphitheater. Telescope viewing to follow program, weather permitting.

A ranger and intern help two children do an activity on the sand at Junior Ranger Day
A ranger and an intern help two children do the Pronghorn Sprint at Junior Ranger Day.


Saturday, August 5, 2023
9:00 am - 1:00 pm
Dunes Parking Area

Junior Ranger Day

Join us for Junior Ranger Day August 5 from 9am – 1pm! Park at the Dunes Parking Area and follow signs to the registration table to get started. There will be various stations where kids can interactively learn about the dunes, artifacts, fossils, and wildlife, and earn prizes upon completion. Stop by anytime between 9am and 1pm to participate!

This special annual event is sponsored by Friends of the Dunes, a non-profit citizen’s support group for Great Sand Dunes National Park and Preserve. In cooperation with the National Park Service, the Friends provide a forum for citizen involvement in planning decisions, focus public interest on issues and need, and provide volunteer and financial aid for projects beyond the scope of the park’s budget. Learn more:

Milky Way over Dune Ripples September 2021
Milky Way over Dune Ripples

NPS/Patrick Myers

Saturday, August 12th, 2023

Annual Astronomy Event

Constellation tours, telescope viewings, program, and more - details to be announced soon!

The full moon hovers over the dunes at night as Medano Creek reflects its light in the foreground
Full moon over the dunes

NPS/Patrick Myers

Saturday, October 28, 2023

Full Moon Hike

Dress warmly and hike under a full moon with a park ranger! The hike will start at the Amphitheater parking lot and end at the base of the dunes. Details to be announced as they develop.


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Last updated: December 2, 2022

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Mailing Address:

Visitor Center
11999 State Highway 150

Mosca , CO 81146


719 378-6395
Great Sand Dunes Visitor Center main number

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