Incredible sight. This came from a National Geographic story (link to article), so no, I didn’t see this and capture it in all its splendid wonder. Here’s a bit of the article that explains what it is (great for factoids):
It looks like a rainbow that’s been set on fire, but this phenomenon is as cold as ice. Known in the weather world as a circumhorizontal arc, this rare sight was caught on film on June 3 as it hung over northern Idaho near the Washington State border.