Think you’re tough for riding through the winter? Check out this documentary about the 2001 Iditasport adventure race along the Iditarod Trail on foot, ski or bike. Covering up to 1,100 miles across Alaska in the winter could be life-changing or deadly, depending on how it goes. Watch for endurance race legend Mike Curiak on what appears to be an early version of a home-grown fat bike. I’m sure the bikes ridden these days look a lot different!