Sled dog each year, but after the 1995 events, it was decided to hold them every two years, which facilitated the bidding process and enabled the host organization more time for preparation. Togo was the lead sled dog of Leonhard Seppala and his dog sled team in the 1925 serum run to Nome across central and northern Alaska. Balto was the lead dog of the sled dog team that carried the diphtheria serum on the last leg of the relay to Nome during the 1925 diphtheria epidemic. He was driven by musher Gunnar Kaasen, who worked for Leonhard Seppala. Seppala had also
Iditarod Trail Sled Dog Race concerns arise whenever intense competition results in dogs being pushed beyond their endurance or capabilities", according to Vice President Stephen Zawistowski. Iditarod Trail Committee monitors the dogs' health. On May 18, 2007, the Iditarod Trail Committee Board of Directors announced that they had suspended Ramy Brooks for abusing his sled dogs. The suspension was for the 2008 and 2009 races, to be followed by three years probation. Brooks has now retired from dog racing. In 2017 Wells Fargo announced that it would no longer sponsor the race. While it declined to give specific reasons for the withdrawal of funds, Iditarod