I found this moth photo while going through a box of family photos. It was taken somewhere in Colorado in July or August 1991 - I was 12 years old (the hand is mine, but I don't remember the specifics) and we were on a family vacation that started in Albuquerque and ended in Denver.

I think the moth is a Great Tiger Moth (Arctia caja) - range is about right, and the other tiger moths tend towards more elaborate forewing patterns.