Sun Valley's Dark Sky

Sun Valley is DarkSky Certified Resort

Sun Valley Resort has been recognized as a DarkSky Certified Resort, becoming the first resort in the United States to receive the designation through the DarkSky Approved Lodging Program.

Central Idaho holds one of the last vast stretches of natural nighttime darkness in the United States—a rare and vanishing treasure. Designated in 2017 as America's first "Gold-Tier" International Dark Sky Reserve, this strictly regulates light pollution to preserve views of the Milky Way, constellations, and nocturnal ecosystems. Spanning 906,000 acres (1,416 square miles), the reserve extends from Ketchum and Sun Valley all the way to Stanley, encompassing the Sawtooth National Forest.

Read the Press Release

2026–2027 Dark Sky Calendar

What This Means

With exceptional night sky visibility and a setting uniquely suited for stargazing and nighttime recreation, Sun Valley’s high alpine terrain creates rare opportunities to experience the outdoors after dark.

As part of the certification process, Sun Valley Resort demonstrated compliance with DarkSky standards covering habitat protection, public awareness around light pollution, and lighting practices that limit artificial light across the mountain.

Every guest who visits Sun Valley now has the opportunity to experience the impact of reduced light pollution firsthand, and to leave with a deeper appreciation for the night sky.

Recommended Stargazing Spots

Bald Mountain (The Roundhouse) – The marquee experience with panoramic sky views above the valley light
Anywhere out Trail Creek (east of Sun Valley) – A classic Sun Valley setting with open meadow views and minimal surrounding light
Dollar Mountain Lodge – Wide open skies with a low ambient light footprint, perfect for stargazing without a telescope
Sun Valley Resort – Resort-wide dark sky compliance means even the village offers a strong stargazing baseline – Check out the Sun Valley Pavilion Lawn, Whitecloud Trail System and the Hemingway Memorial areas.
Galena Summit (nearby, Hwy 75) – One of the darkest spots in the Central Idaho Dark Sky Reserve, approximately 30 miles north of Sun Valley

Stargazing Tips

Go After 10pm
The best viewing is typically from 1am to 3am. Stay at least two hours to let your eyes adjust.

Dark-Adapt for 30 Minutes
Avoid white light. Use a red-light torch, since red wavelengths preserve night vision, and keep phones face-down between checks.

Check the Moon Phase
A bright moon washes out fainter meteors. Check the TimeandDate moon calendar before you head out.

Dress in Layers
Desert temperatures drop sharply after sunset, even in summer. Bring a jacket and a blanket for lying back.