Missoula, MT - Checking in.
People love to ride here. Not much will keep the dedicated biker inside all winter. I was out earlier this week in single digit temps clawing my way up forest roads, and passed a bunch of commuters going through town.
That said, this winter has been weird. -10 one day, and then +40 a couple days later. All winter. Ideal conditions are to be had in the middle of these extremes. 10-15 degrees is plenty warm enough to ride, and you don't get coated in slush and mud... bonus!