What are the two meanings of Iditarod as noted in the memoir, Winterdance?

Iditarod has two meanings in the book. Gary runs in the Iditarod Race, which is an eleven hundred and eighty mile trek from Anchorage to Nome. Iditarod is also a town in Alaska that is often one of the stops along the race. The original Iditarod trail was used to bring supplies to miners in the 1800s.