
Gunnar Kaasen and Balto after their team carried the final 53 miles of a 674-mile diphtheria-antitoxin relay to Nome, 1925
Twenty mushers and their dog teams relayed diphtheria antitoxin from Nenana to isolated Nome in about five and a half days. Kaasen's team, led by Balto, brought it into Nome after covering the final 53 miles. Balto became the public face of the rescue, although Leonhard Seppala and Togo covered the relay's longest and most dangerous stretch. The achievement belonged to the entire chain of mushers and dogs.