1925 serum run to Nome
The 1925 serum run to Nome was when dog sled teams transported medicine to the sick children of Nome. It is also called the Great Race of Mercy and The Serum Run. Leonhard Seppala and his dog Togo travelled the longest and most dangerous part of the journey.  But a musher named Gunnar Kaasen and Balto became the most famous because they did the last part.