But then you have a great turnout, and it's all worth it.
This is a fairly common event if you're in Yellowstone and you know about light and natural phenomenon, but there is a rainbow on the Lower Falls of the Yellowstone River that you can see at a certain time a certain time of year. The sun is at the correct angle, the falls mist is at just the right angle and the location at Artist's Point is at just the right angle and everything comes together.
As if the color of the Yellowstone Canyon isn't enough, this beautiful rainbow makes it almost fake looking.
This is interesting to watch this time cause I knew what was going to happen, but you get the purple (or rather the violet) color first, then the others fill in till you get all of the Roy G Biv (Red, Orange, Yellow, Green, Blue, Indigo and Violet) spectrum, and nothing colors better than nature.