In preparation for the 2013 Iditarod, Jake Berkowitz and his dog team are seen diligently training in interior Alaska. It was a clear and beautiful day, but the temperature was barely hovering around 20 degrees below zero. It might feel cold for us humans, but these endurance dogs are adapted to the frigid temperatures.

As part of the training, the Iditarod dogs are pulling a truck instead of a loaded sled. There was only a few inches of snow which was quite unusual for this time of the year.