A couple people mentioned that I might have a tougher time running in the thinner air and higher altitude of Montana. Well. I had a terrific 11-mile run in Hamilton. Cool, breezy, sunny, crisp: the temperature at start was 56 degrees. I had beautiful views of the Bitterroot mountains, Como peaks, Blodgett canyon, and ran along Skalkaho creek. It was my favorite run of the summer.
Today I ran five miserable miles in the hot oppressive sun, temperatures in the 80s and the humidity just about that high. I'll take high altitude over high dew point ANY DAY.