Iditarod Trail Sled Dog Race early in the 20th century. The main route of the Iditarod trail extends from Seward in the south to Nome in the northwest, and was first surveyed by Walter Goodwin in 1908, and then cleared and marked by the Alaska Road Commission in 1911 and 1912. The entire network of branching paths covers a total of . Except for the start in Anchorage, the modern race follows parts of the historic trail. The trail is composed of two routes: a northern route, which is run on even-numbered years, and a southern route, which is run on odd-numbered years. Both follow
Iditarod Trail segments pass over private lands. No one entity manages the entire historic trail—management is guided by a cooperative plan adopted by state and federal agencies in the mid-1980s. The federal Bureau of Land Management coordinates cooperative management of the trail and is the primary point of contact for matters involving the entire trail. Every year local groups, community clubs and individuals contribute time and money to maintain and improve the Iditarod Trail. The statewide non-profit Iditarod National Historic Trail Inc. helps protect and improve the trail and keep the "lore of the trail" alive. The Iditarod Trail Sled Dog Race,