I saw the Aurora borealis when I was five. I was on a road trip from Portland, my family lives nearby, to Alaska, where I lived at the time. I had just lived in Missouri, and there was a tornado while I was there, which made me paranoid about the sky turning green. We got to a hotel, and all of the adults just brushed it off when I said the sky was green, so I was the only one to see it, and I don't even remember.

If you're in California(guessing based on your profile), the olypic peninsula and parts of BC have similar places.