Pictures from the 2015 Iditarod dog-sled race

Now in its 42nd year, the Iditarod has been called the “last great race on Earth”, and no wonder, as it covers 1,000 miles of the roughest, toughest yet most beautiful terrain Alaska has to offer. The mushers and their dog teams must contend with temperatures far below zero, winds that can cause a complete loss of visibility and long hours of darkness