Some people consider winter bicycling to be idiotic. Since this blog isn't authorized to determine who's an idiot and who's not, let's instead question whether winter bicycling is or is not extreme. Humans do lots of extreme stuff, and as long as a lot of people participate in that activity (or at least in their wildest dreams wish they could), nobody has an unkind word to say.
This being Colorado, I imagine I don't have to push this argument too far. We, for example, have this guy, whom everyone loves for nothing but his extremism and devotion. The number of winter riders in Denver is growing, and if motorists don't yet expect to see us riding on snowy days, we're nearing the day when they will. If you live in Colorado, there's a good chance you ski, snowboard, climb frozen waterfalls, dogsled, snow pogo, ice dive, glacier snorkel, or slush surf, so if you drive by a cyclist and wonder what that idiot is doing, then you are probably thinking tribally and not globally, my friend.
I said all of that to say this: fat biking in the snow is awesome, and if you haven't tried it, you should. With the price of ski passes moving into four-digit territory (that's $2000 (!) for Aspen or Telluride) and with traffic on I-70 moving slower than a corn cob through a terrier, there's no reason not to try fat biking. If you haven't tried it already, here's a story about what you might sort of expect.
My compatriot J-Mix (J Mikks (J Miques)) and I recently had ourselves quite a time on fat bicycles. It was fifteen degrees when we met at the Apex parking lot.