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
Iron Dog 10th annual race in 1994. The race route now follows parts of the Iditarod Trail, the route of the Iditarod Trail Sled Dog Race. It starts at Big Lake and follows the main trail and its connecting trails until it hits to the Yukon River at Ruby. It follows the river to Kaltag before it heads to the Norton Sound on the Bering Sea at Unalakleet and it follows the coast to Nome. Then it returns along the same path in the reverse order to Ruby, where it diverges off its original path by following the Yukon River and its