On the way to work, there was a huge Rainbow that followed me most of the way. It had to be 2-3 miles across and about 200' high. I asked at work if anyone saw it and no one did. How on Earth could you miss something like that?

We had a very similar one here on Long Island today, too. It was so large and so magnificent that I'm wondering if it was the same one you saw out in Colorado! This being New York, though, when I asked if anyone saw it, they just replied "Yeah, I saw it."

Most of the people around us simply don't look at the sky. It's kinda sad.

busy texting in their cars

They wouldn't believe me about the unicorn either

might have been wipering the rain off the windcreen, from inside te car .. or the angle of sight was not right.
sun has to be to your back .

https://ffden-2.phys.uaf.edu/211.web....la/Page_2.html

Don't know about you, but it would concern me if I was followed by a rainbow that no one else could see.