A team leaves the Nenana checkpoint in 2017. The Iditarod is a grueling journey over snowy mountains, icy rivers, and frozen tundra toward the tiny town of Nome on the Bering Sea coast. As the race has grown increasingly competitive in recent years, top teams make the trek in between eight and nine days.

A team leaves the Nenana checkpoint in 2017. The Iditarod is a grueling journey over snowy mountains, icy rivers, and frozen tundra toward the tiny town of Nome on the Bering Sea coast. As the race has grown increasingly competitive in recent years, top teams make the trek in between eight and nine days.