Dark skies & stargazing in Colorado

What to see & when

The Milky Way

Under a dark sky, the Milky Way — our own galaxy seen edge-on — is breathtaking. Its bright core is a spring-through-early-fall target, with the most comfortable evening viewing in late spring, summer, and early fall. The real key is a moonless night away from city light, after full dark.

The moon (your best friend and your enemy)

• A new moon (no moon in the sky) is darkest and best for the Milky Way and faint objects.
• A full moon washes out the faint stars — but it's lovely for a moonlit hike or snowshoe.
• Check a moon-phase calendar and aim for the nights around new moon for serious stargazing.

Meteor showers

There's a shower almost every month, but the two best are easy to remember: the Perseids peak in mid-August (warm nights, lots of meteors), and the Geminids peak in mid-December (cold, but often the year's best show). A bright moon can turn even a great shower into a quiet one, so check the current year's peak date, the moon phase, and the weather before you drive hours to a dark site. You need no telescope — in fact one only gets in the way. Bring a reclining chair or a pad and a warm bag, give your eyes 20–30 minutes to adjust, and scan a wide patch of sky rather than staring at one spot; after midnight is usually best (though the Geminids show well earlier in the evening, too).

Planets, satellites & the space station

Bright planets like Venus, Jupiter, Saturn, and Mars are visible to the naked eye at various times — a sky app tells you what's up tonight. You can also spot satellites drifting across, and the International Space Station passing over (NASA's "Spot the Station" gives the times).

The northern lights (rare, but possible)

Aurora is rare in Colorado. It usually takes a strong geomagnetic storm, clear skies, low light pollution, and a dark northern horizon all at once. The Sun reached solar maximum in October 2024, and the slow decline keeps roughly 2024 into 2026 a better-than-usual window — but most nights still show nothing, so watch the forecasts (NOAA's Space Weather Prediction Center) rather than counting on it.

Eclipses & special events

The occasional lunar eclipse (a "blood moon") is safe to watch with the naked eye and visible from anywhere with a clear sky. A solar eclipse needs certified eclipse glasses (never look at the Sun unprotected) — and Colorado sees only partial solar eclipses for years to come, so check the date and path for any event. A sky calendar or app keeps you ahead of them.

How to stargaze (the practical part)

You don't need fancy gear — you need dark, time, and a little know-how.

• Let your eyes adjust. Useful night vision builds after about 20 minutes in the dark (deeper adaptation takes longer), so give it 20–30 minutes and protect it. One glance at a bright white phone screen sets you back, so use the dimmest red light that lets you move safely (a headlamp's red mode, or red tape over a flashlight). Red preserves your night vision and everyone else's.
• Pick your night. You want a clear, transparent sky, a new (or absent) moon, and a spot away from city light with an open view. Read a clear-sky forecast (Clear Sky Chart or Astrospheric) for transparency and "seeing," not just whether it'll rain.
• Start with your eyes, then upgrade: binoculars (7×50 or 10×50) are the best first step — they reveal the moon's craters, star clusters, Jupiter's moons, and the Andromeda Galaxy. A telescope brings in the planets and deep-sky objects (but is more to learn and haul), and a sky app (Stellarium, SkyView) names the stars and constellations for you.
• Learn a few signposts. Start easy: find the Big Dipper and follow its pointer stars to Polaris (the North Star); in winter, Orion is unmistakable; in summer, the bright Summer Triangle rides overhead. A few landmarks make the whole sky click.
• Don't rush the gear. Skip the cheap department-store telescope — wobbly mounts ruin the hobby. Try one at a star party before you buy.
• Arrive before dark so you can set up and find your spot while you can still see.

A quick word on astrophotography

Those glowing Milky Way photos take a tripod, a wide fast lens, manual focus set to infinity, a high ISO, and a long exposure (roughly 15–25 seconds), shot on a moonless night — ideally with a dramatic foreground like the dunes or a peak. Apps like PhotoPills help plan where the Milky Way will be. No DSLR? A modern phone's night mode on a small tripod can capture a surprising amount of the Milky Way too.

Night safety & comfort

Stargazing is gentle, but a few Colorado realities catch people out:

• It gets cold at night — even in summer. At altitude, a warm afternoon can turn near-freezing. Dress much warmer than you think, and bring blankets, a reclining chair or pad, hand warmers, and a hot drink. Comfort is the difference between an hour and a magical all-nighter.
• Bring a red headlamp (and a spare), plus a charged phone — and download your sky app's maps before you lose signal.
• Tell someone your plan and know your route in and out — it's easy to get turned around in the dark, so don't hike unfamiliar terrain at night.
• The drive is the real risk. Watch for deer and elk on rural highways at dusk and after dark — a leading cause of Colorado crashes. Keep a full tank, pull fully off narrow shoulders into legal pullouts, and never block a gate or ranch road. Much of the land near dark skies is private ranchland: don't cross fences or trespass in the dark.
• Mind the altitude (see the trails guide) and the wildlife (see the wildlife guide — keep a respectful distance, and remember nocturnal animals' eyes are very sensitive to light, so keep yours low and red).
• Know the site's after-dark rules and respect closures and reservations (see the camping guide).