The Alaska Railroad (reporting mark ARR) is a Class II railroad[1][2] which extends from Seward and Whittier, in the south of the state of Alaska, in the United States, to Fairbanks (passing through Anchorage), and beyond to Eielson Air Force Base and Fort Wainwright in the interior of that state. Uniquely (for the US), it carries both freight and passengers throughout its system, including Denali National Park. The railroad has a mainline over 470 miles (760 km) long and is well over 500 miles (800 km) including branch lines and siding tracks.