Last night I got out for a nice bike ride. Didn't care that it was 10F. The street conditions were okay, so I bundled up to go out. It was a beautiful, still night. Managed to see a few stars and planets in spite of the street lights. Traffic was light. If I had truly arctic gear that I could ride in, perhaps more than 6 miles might be comfortable in that temperature. I didn't see any other bikes out and about. Happy Bike Winter!