Sled dog lighter sled dogs." Outside of Alaska, dog-drawn carts were used to haul peddler's wares in cities like New York. In 1925, there was a diphtheria outbreak in Nome, Alaska. There was not enough serum in Nome to treat the number of people infected by the disease. There was serum in Nenana, but the town was away, and inaccessible except by dog sled. A dog sled relay was set up by the villages between Nenana and Nome, and 20 teams worked together to relay the serum to Nome. The serum reached Nome in six days. The Iditarod Trail was established on
Iditarod Trail Sled Dog Race lead teams are often within a few hours of each other at this point. , the race has been decided by less than an hour seven different times, less than five minutes three times. The closest race in Iditarod history was in 1978 when the winner and the runner-up were only one second apart. The official finish line is the Red "Fox" Olson Trail Monument, more commonly known as the "burled arch", in Nome. The original burled arch lasted from 1975 until 2001, when it was destroyed by dry rot and years of inclement weather. The new arch is a