Iditarod Trail dogs played in Alaska's history, Redington and his friends created an epic sled dog race from Anchorage to Nome. The Iditarod Trail Sled Dog Race ultimately revived dog mushing in Alaska and around the world. After years of effort by Redington and the Alaska Congressional delegation, the Iditarod was designated as a National Historic Trail in 1978. National Historic Trails commemorate major routes of exploration, migration, trade, communications, and military actions that formed America. Across America, only 16 trails have been honored as National Historic Trails. The Iditarod is the only Alaskan trail in the national system, and the only
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