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How to See the Spectacular Moonbow at Cumberland Falls State Resort Park in Kentucky (Updated for 2021)

The Cumberland Falls Moonbow is a spectacular lunar rainbow at this Kentucky state park. Here is how to see it yourself.

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Written by Jason Barnette
on March 28, 2019
Posted in
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The camera shutter closed, a digital photo appeared on the LCD on the back of my camera, and suddenly a throng of people surrounded me. With wide eyes they glared at the photo, back to the thundering Cumberland Falls, and back to my camera again. Finally, someone shouted, “I see it! I can see it in your photo!”

The “it” she was referring to was the Cumberland Falls Moonbow, a spectacular lunar rainbow that can be seen in the mist at Cumberland Falls State Resort Park in Kentucky. But you have to know when to see it, how to get there, and what to expect. Keep reading to find answers to all that and more.

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What is a Moonbow?

The first time I visited Cumberland Falls State Resort Park was on an overcast day in 2012. The waterfall was pretty amazing to see even if I couldn’t capture any decent photos that day. But just as I was leaving the park a ranger asked me a question that would change everything, “Are you coming back tomorrow for the moonbow?”

It was the first time I’d ever heard of a moonbow so I asked about it. A “moonbow” is when light from a full moon on a clear night reflects in the mist of a waterfall and creates rainbow colors in the moisture. But this doesn’t just happen during any full moon or at any waterfall; there are certain conditions that must be met to create a moonbow.

Cumberland Falls just happens to be one of the best places in the Western Hemisphere to meet all these conditions.

Full Moon

It takes quite a bit of light to create a rainbow. In fact it normally takes direct sunlight beaming through the sky to create the optical illusion in the sky.

But even during a full moon only about 13% of the sun’s light is reflected down to Earth. That’s why even under the best of conditions a moonbow is still a tricky and difficult thing to see.

Cloudless Night

Because a moonbow requires every lux of light available it really needs to be a cloudless night. Even a thin haze can prevent a moonbow from appearing if all the other conditions are met.

Lots of Moisture

Even on a cloudless night during a full moon you won’t see a moonbow above every waterfall. It takes a lot of moisture in the air to refract the light and create the optical illusion.

Cumberland Falls is known as the “Niagara of the South” because it is a rather large waterfall. It only has a 68’ drop but at 125’ wide Cumberland Falls has more water volume than any other waterfall on the East Coast south of Niagara Falls.

The Perfect Combination

In order to see the moonbow you need to visit Cumberland Falls when lots of water is flowing, within one or two days of a full moon, and on a completely cloudless night. Getting those three conditions to align is tricky, but it actually happens pretty regularly at Cumberland Falls State Resort Park.

Cumberland Falls is pretty spectacular during the daytime, too.

Seeing the Cumberland Falls Moonbow

About a year after learning about the Cumberland Falls Moonbow I returned to the state park to see it. I had spent my day nearby in the Big South Fork National River & Recreation Area. I was exhausted from all the hiking but nothing was going to stop me from seeing the moonbow.

The large parking lot was brightly lit (but don’t worry it doesn’t ruin the moonbow) and nearly full. There were several park rangers helping people out and guiding them toward the moonbow. Just to let you know how much the park loves this natural event: the trail is called the Moonbow Trail.

Although there are several places to admire Cumberland Falls there is only one place to see the moonbow: the Upper Overlook. This overlook is less than a five-minute walk along a paved path from the visitor center. It’s located on exposed rocks beside the top of the falls so be careful walking out there at night.

That night I set up my tripod, dialed in the camera settings, and fired off the first photo. One thing you have to keep in mind is that it’s a little difficult to see the moonbow with your naked eyes. Long exposure photos actually work much better.

People were craning their necks, shining flashlights at it, hoping to catch a glimpse. The shutter clicked on my camera. A photo appeared on the LCD screen. Suddenly I was surrounded by a throng of people all eagerly looking at the brightly-lit long exposure photo. Finally, a nice old lady shouted, “I see it! I can see it in your photo!”

Just like that, I was a celebrity. Lasted about ten minutes.

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The Cumberland Falls Moonbow I captured in 2013. I really need to see this again.

Moonbow Dates 2021

The absolute best day to see the Cumberland Falls Moonbow is the day of a full moon. However one or two days before and after are also good times and under just the right conditions can create a beautiful moonbow.

Here are the Cumberland Falls Moonbow dates for 2021.

How to Use This Calendar

The best time to see the moonbow is on the day of the full moon, starting about two hours after sunset, and lasting about another two hours. These dates and times are marked in bold below.

However, there are some alternate dates to see the moonbow just not the full effect. The moonrise changes by about an hour each day so the two days before and after offer some additional chances.

Each of the two days before are okay times if you just happen to be in the area. The moonrise will be one or two hours before sunset which means the sky will not be dark enough to truly enjoy the event.

Each of the two days after are excellent alternate dates to see the moonbow. The moon will rise an hour later each day which means the time window to see the moonbow is later in the night, after well past midnight. Bring snacks.

January

266:30 p.m. – 8:30 p.m.
277:00 p.m. – 9:00 p.m.
287:30 p.m. – 9:30 p.m.
298:00 p.m. – 10:00 p.m.
308:30 p.m. – 10:30 p.m.

February

256:30 p.m. – 8:30 p.m.
267:00 p.m. – 9:00 p.m.
277:30 p.m. – 9:30 p.m.
288:00 p.m. – 10:00 p.m.
18:30 p.m. – 10:30 p.m.

March

268:30 p.m. – 10:30 p.m.
279:00 p.m. – 11:00 p.m.
289:30 p.m. – 11:30 p.m.
2910:00 p.m. – 12:00 a.m.
3010:30 p.m. – 12:30 a.m.

April

248:30 p.m. – 10:30 p.m.
259:00 p.m. – 11:00 p.m.
269:30 p.m. – 11:30 p.m.
2710:00 p.m. – 12:00 a.m.
2810:30 p.m. – 12:30 a.m.

May

249:00 p.m. – 11:00 p.m.
259:30 p.m. – 11:30 p.m.
2610:00 p.m. – 12:00 a.m.
2710:30 p.m. – 12:30 a.m.
2811:00 p.m. – 1:00 a.m.

June

229:30 p.m. – 11:30 p.m.
2310:00 p.m. – 12:00 a.m.
2410:30 p.m. – 12:30 a.m.
2511:00 p.m. – 1:00 a.m.
2611:30 p.m. – 1:30 a.m.

July

219:30 p.m. – 11:30 p.m.
2210:00 p.m. – 12:00 a.m.
2310:30 p.m. – 12:30 a.m.
2411:00 p.m. – 1:00 a.m.
2511:30 p.m. – 1:30 a.m.

August

209:30 p.m. – 11:30 p.m.
2110:00 p.m. – 12:00 a.m.
2210:30 p.m. – 12:30 a.m.
2311:00 p.m. – 1:00 a.m.
2411:30 p.m. – 1:30 a.m.

September

188:30 p.m. -10:30 p.m.
199:00 p.m. – 11:00 p.m.
209:30 p.m. – 11:30 p.m.
2110:00 p.m. – 12:00 a.m.
2210:30 p.m. – 12:30 a.m.

October

188:00 p.m. – 10:00 p.m.
198:30 p.m. – 10:30 p.m.
209:00 p.m. – 11:00 p.m.
219:30 p.m. – 11:30 p.m.
2210:00 p.m. – 12:00 a.m.

November

176:00 p.m. – 8:00 p.m.
186:30 p.m. – 8:30 p.m.
197:00 p.m. – 9:00 p.m.
207:30 p.m. – 9:30 p.m.
218:00 p.m. – 10:00 p.m.

December

166:00 p.m. – 8:00 p.m.
176:30 p.m. – 8:30 p.m.
187:00 p.m. – 9:00 p.m.
197:30 p.m. – 9:30 p.m.
208:00 p.m. – 10:00 p.m.

Parking for the Moonbow

The visitor center parking lot at Cumberland Falls State Resort Park is pretty big, but you have to keep in mind sometimes there are thousands of people who try to witness the moonbow. Parking will go quickly.

My suggestion is to arrive as early as possible for the moonbow to guarantee a parking spot, but if all else fails give the state park a call. They usually have some plans set up for massive crowds.

Admission for the Moonbow

Maybe the second best part about the Cumberland Falls Moonbow is that it’s free! In fact access to this state resort park is always free.

The Upper Overlook can get crowded during the moonbow. Be careful. Be kind.

Tips for a Fantastic Experience

Here are a few tips to help you make the most out of your trip to witness the Cumberland Falls Moonbow.

  • Arrive early. You won’t be able to see the best effect of the moonbow until about an hour after sunset, but I would still recommend arriving early to snag a parking spot.
  • You won’t be able to see the moonbow until about an hour after sunset, so time your visit according to the Moonbow schedule above.
  • Because of time change (yuck) and the Earth’s tilt the moonbow is much earlier during the winter months, and sometimes well after midnight during the summer months.
  • Bring a flashlight or headlamp. For obvious reasons there are no street lamps or lighting around the Upper Overlook. But be careful not to shine the line in anyone’s face or toward any cameras.
  • For the best experience book a couple of nights at DuPont Lodge in the park. It’s just a 0.5-mile hike down from the lodge to the visitor center parking lot along the Cumberland Falls Trail.

Photography Tips for Capturing the Moonbow

Before I get into camera settings and equipment I have to stress one thing above all others: put your cellphone away. Seriously. You will not be able to capture a decent photo of the moonbow with a cellphone. But if you do just have to give it a try let me stress a second thing: turn the flash off. There is nothing worse than your eyes dilating, adjusting to the dim moonlight, trying to see the moonbow, only to have a flash pop off from a cellphone. Don’t be one of those people.

Here are a few tips for camera equipment and settings to capture a photo of the Cumberland Falls Moonbow:

  • Bring a tripod.
  • Bring a remote shutter release. You may need to do a very long exposure so the best shutter release would be a digital intervalometer.
  • Set your ISO to 400. If you have a newer camera model with better low-noise at higher ISO settings you can try 800 or 1600, but I wouldn’t recommend beyond that with even the best of cameras.
  • Start with an exposure of 2 minutes at 400 ISO, 1 minute at 800 ISO, and 30 seconds at 1600 ISO. Most camera models only allow for a 30-second maximum exposure with the built-in settings. This is why you need a digital intervalometer remote shutter release; these allow you to use the “bulb” exposure setting and shoot as long as you like.

Look closely. Can you see the stars? Headlights streaking on the highway? That bright light in the sky is the full moon over Cumberland Falls State Resort Park.

Have You Seen the Cumberland Falls Moonbow?

If you’ve seen this absolutely extraordinary natural event leave me a comment below and tell me all about it! Seeing the Cumberland Falls Moonbow was one of the most rewarding experiences all year and that photo has been one of my favorites ever since.

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14 Responses

  1. Thanks for highlighting my hometowns claim to fame. I was fortunate enough to see some pale color with my eyes in the wee am of my 50th birthday. There was a camera that caught it in its glory at the same time. No alcohol needed. Visit KFC for our other claim if you come back to Corbin,KY

    1. The KFC is an icon of Corbin?! Or do you just mean the food chain in general haha? I am so glad you were able to catch a glimpse of this amazing natural sight!

  2. The KFC in Corbin is the original one – Harland Sanders Cafe and Museum. 🙂 Thank you for the info on the moonbow. We are going in Nov or December.

  3. My grandfather was the original owner of the falls. And, much of our people still live here. After the civil war my grandfather was dooped into believing there was silver under the falls. He then sought out investors from all over the U.S. and sadly after found there were no treasures per say under the falls. He spent nearly the rest of his life paying the money back to the investors. After his death I am told that grandma left the falls and travelled, to eventually open a park now known as “Coney Island” it has been said that apparitions dressed in period clothing of that time appear across the water standing on the other side. I believe them to be my Great Great grandfather and grandmother.
    Deborah Perry Randall-

  4. I took my daughter last summer and we saw it clearly! It was like the ghost of a rainbow. Make sure to look for it from the top of the waterfall and not the bottom. I made that mistake the first night. Then my daughter spotted it for me!

    1. I tried it from both! I started at the upper overlook because the park ranger told me that was the spot to go. But I went back the second night and wanted to try something different, so I went to the lower overlook. Bleh! I’m so glad you two had a chance to see it!

  5. Hi Jason! Thank you for the article! I have plans to stay at the park and hopefully see the moonbow over Halloween weekend this year. Would you be willing to share what lens, focal length, and aperture you used?

    Also, is the “upper observation” area/deck where most people are funneled to, or is this a place to seek out away from the main herd of people? 🙂 Thank you!

    1. I don’t mind sharing at all! I used my 12-24mm f/4 wide angle lens set to 12mm, f/8 aperture, and a 30-second exposure. This will give you a good starting point, but it also depends on how clear the sky is and even how close the moon is to the Earth. Yes, this is the upper observation deck at the top of the waterfall. It’s the only place to see the moonbow. I tried from below, but saw nothing whatsoever. Get there early, maybe an hour early, and set up your camera on a tripod to “stake” your location before the people arrive.

  6. Saw it last night and was able to play with the settings on my iPhone xsmax and get pictures of it. It was pretty packed there and cold but everyone was friendly. We were airdropping pictures to each other and sharing how to change settings. It was a great time and I enjoyed it! Only hot chocolate was missing!

    1. Haha this sounds so awesome! It’s been a few years since I saw this and I’m sure my iPhone 11 could probably capture pretty good photos now. I’m glad you had a good time seeing it!

  7. This is awesome! I am going down there 4th of July week ,and of course I won’t get to witness the great Moonbow , Thank you for this it was a wonderful read!

    1. I’m glad you enjoyed it! I’m actually returning to the park this year so I can see the Moonbow again – I can’t wait to see it and the waterfall again!

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