Iditarod: Toughest Race on Earth Iditarod: Toughest Race on Earth Iditarod: Toughest Race on Earth was a 2008 American reality television miniseries on the Discovery Channel that featured the 2008 Iditarod Trail Sled Dog Race from Anchorage to Nome, Alaska. The show follows and documents selected racers and their dogs during the trek through Alaska's wilderness. Iditarod entrants pay $3,000 to enter the race and must have completed certain qualifying races beforehand. Expenses for the race can exceed $20,000 and mushers often seek sponsors to aide in paying for the race. Most mushers hold outside jobs in addition to racing. During the course of the
Iditarod Trail Sled Dog Race reveals the results of tests on the dogs. Each team is composed of twelve to sixteen dogs, and no more may be added during the race. At least five dogs must be on the towline when crossing the finish line in Nome. Mushers keep a veterinary diary on the trail and are required to have it signed by a veterinarian at each checkpoint. Dogs that become exhausted or injured may be carried in the sled's "basket" to the next "dog-drop" site, where they are transported by the volunteer Iditarod Air Force to the Hiland Mountain Correctional Center at Eagle River