Cumberland Falls Moonbow Dates 2024 Dates. Cumberland falls’ moonbows are so reliable there’s a calendar for them—dates surround the full moon, with two or three days on either side. The cumberland falls moonbow, also called a white rainbow or lunar rainbow, is formed just like a rainbow when light is refracted in tiny water drops.

A moonbow is made by moonlight and mist, often from a waterfall. Cumberland falls is one of only two places in the world where you can view a moonbow on a consistent basis.