On Jan 5, 2015 it was -13 F with a 8-10 mph headwind for a windchill of -30F (11 miles took about a hour). I stopped to open some vents and put away my frozen glasses and took this frosty face selfie. My big challenge that day was drying all of my gear for the ride home - I got very sweaty on the morning ride.
Now I work from a home office, so I just go out for fun in the sub-zero weather. Sunday, people on Facebook called me crazy for biking 25 miles in -10F weather... Later that day, TCF stadium was full of people sitting on their butts watching the Vikings lose. Who's crazy???