Frosty and noble, sled dogs are incredible athletes. Each March the Iditarod Sled Dog Race runs through a harsh and beautiful landscape to Nome, Alaska. The race uses the Iditarod National Historic Trail, a 2,300-mile system of winter routes that first connected ancient Native Alaskan villages. The trail cuts through tundra, spruce forest and across rivers serving up some truly tough conditions. Thinking of trying it out? The Bureau of Land Management recommends knowledge in extreme winter camping and travel by ski, dog team, snowmobile or fat tire bike. Photo by Bob Wick, Bureau of Land Management.