20 isn’t really even that cold. That’s what I kept telling myself in the days leading up to the Tunnel Hill 100. The start temp was predicted to be around 20, with a high barely cracking freezing on Saturday, then back down to 20 Sunday morning. The reason I kept telling myself that 20 isn’t cold is that I was genuinely scared. By mid-winter, running in 20s weather would be pretty much the norm. But even the cold 50ks I’d run were just a few hours long. I had no idea how we’d deal with 24+ hours of frigid temps.