Iditarod Trail Sled Dog Race to the 2010 census, it has a population of 401, making it the largest checkpoint in the Interior. McGrath is also notable for being the first site in Alaska to receive mail by aircraft (in 1924), heralding the end of the sled dog era. It still has a good airfield, so journalists are common. Following McGrath is Takotna, formerly a commercial hub during the gold rush. The ghost town of Ophir, named for the reputed source of King Solomon's gold by religious prospectors, is the next checkpoint. By this stage in the race, the front-runners may be several days ahead
Sled dog racing weight per dog is carried in the sled. This type of race only has about 1 to 5 dogs pulling the sled or scooter at one time. The American Dog Derby is the oldest dogsled race in the United States and was the first dogsled race that rose to international prominence. Begun in 1917 and heavily promoted by Union Pacific Railroad, it was on par with the Kentucky Derby and with the Indianapolis 500 in terms of interest and press coverage in the early part of the 20th century and was considered to be the world championship dogsled race. American