Moon Phases and Stargazing in Rocky Mountain National Park

The Moon is the single biggest factor in how good a night of stargazing will be, bigger than the season, bigger than the spot you pick. A full moon is a floodlight. It washes out faint stars, hides the Milky Way, and turns a dark sky gray. A new moon is the opposite: the darkest skies of the month, when the faintest stars come out. Everything in between is a tradeoff, and knowing the tradeoff is how you pick the right night.

The cycle in plain terms

The Moon runs through its phases on a 29.5 day cycle. At the new moon, the Moon sits near the Sun in the sky and is not visible at night at all. The sky is at its darkest. Over the next two weeks the lit portion grows: crescent, first quarter, gibbous, then full. At the full moon, the Moon rises at sunset, stays up all night, and sets at sunrise. Then it wanes back down through gibbous, last quarter, and crescent, rising later each night, until the next new moon.

The rule of thumb is simple. The week around the new moon is the best stargazing of the month. The week around the full moon is the worst for faint stars and the best for looking at the Moon itself.

What each phase is good for

New moon nights are for everything faint: the Milky Way, meteor showers, faint star clusters, and the dimmest deep sky objects. If you are planning a trip around stargazing, pick the new moon week.

First quarter nights are a split decision. The Moon is bright in the evening and sets around midnight, so the first half of the night is moonlit and the second half is dark. Go late, or enjoy the Moon early and the dark sky after it sets.

Full moon nights are for the Moon. Craters, mountain ranges, and the bright rays splashed across the surface all show beautifully through a telescope or binoculars. The peaks glow in moonlight, and the landscape itself becomes part of the show. Faint stars and the Milky Way will be washed out, so do not plan a Milky Way night under a full moon.

Last quarter nights run the other way around. The Moon rises around midnight, so the evening is dark and the late night is moonlit. An early evening outing under a last quarter moon gets you dark skies before bedtime.

What a supermoon actually looks like

A supermoon is a full moon that happens near the closest point of the Moon's orbit, and it looks a little bigger and a little brighter than an average full moon. How much bigger? About 6 to 7 percent wider, and roughly 11 to 16 percent brighter. That is real, and it is also hard to notice with the naked eye unless you compare it side by side with another full moon. What people do notice is a supermoon rising near the horizon, where the Moon always looks huge against trees and rooftops. That horizon effect is an illusion of perspective, but it is a beautiful one, and it is the best time to photograph a full moon.

The Beaver Moon on November 24, 2026 is a supermoon, the full moon nearest perigee in this stretch of the calendar. It will be worth an evening out, for the Moon itself and the moonlit landscape, not for faint stars.

The November 2026 moon calendar

New moon: November 9, 2026. The darkest skies of the month run roughly November 6 through 12, which is also when the Taurid meteor showers peak. That overlap is the best stargazing window of the fall.

First quarter: mid November. Evenings are moonlit, late nights dark.

Full Beaver Moon: November 24, 2026. A supermoon, up all night. Great for Moon watching, poor for faint stars.

Last quarter: late November. Dark evenings, moonlit late nights.

December follows the same pattern: new moon December 8, full Cold Moon December 23.

Check the moon before you book anything

Before you plan a night out, check two things: the phase and the moonrise time. A full moon that rises at 9 PM still leaves you an hour or two of dark sky after sunset. A full moon that rises at sunset leaves you none. Free moon calendars and sky apps show both numbers in seconds, and they are the difference between a great night and a washed out one.

Quick answers

Which moon phase is best for stargazing? The new moon. The week around it has the darkest skies of the month.

Is a full moon bad for stargazing? For faint stars and the Milky Way, yes. For the Moon itself, moonlit peaks, and bright planets, a full moon night is excellent.

What is a supermoon? A full moon near the closest point of its orbit. It looks slightly bigger and brighter, most noticeably when it rises near the horizon.

Can you see the Milky Way under a full moon? No. Moonlight washes it out completely. Wait for the new moon week.

Does the Moon affect meteor showers? Yes, a lot. A bright moon hides all but the brightest meteors. The best meteor nights fall in the new moon week.

Pick the dark week

If you have one free night and want the most stars, pick a night in the new moon week, check that the sky is clear, and get away from town lights. If you have a full moon night free, come look at the Moon instead. Either way, the sky over Estes Park rewards showing up. Our guided Stargaze tour runs on clear nights in Rocky Mountain National Park through every phase. See the Stargaze tour here: https://estesparktourguides.com/products/hikebyheadlamp