The story of Balto is a legendary tale of endurance and survival from the 1925 "Great Race of Mercy," where a relay of sled dog teams raced across the Alaskan wilderness to save the town of Nome from a deadly diphtheria outbreak. The Race Against Death

While the dog and musher Leonhard Seppala ran the longest and most dangerous leg (about 260 miles), Balto was the lead dog for the final 53-mile stretch into Nome.

In January 1925, children in the remote town of Nome began dying from diphtheria. The only supply of life-saving antitoxin was in