Auburn is a city of 67,005 (2008) located in the U.S. state of Washington, in King County with some spill-over into Pierce County. Though founded before either Seattle or Tacoma (Seattle metropolitan area) had suburbs, Auburn is now often thought of as a suburb of these two cities. Auburn is roughly bordered by the suburbs of Federal Way, Pacific, and Algona to the west, Sumner to the south, unincorporated King County to the east, and Kent to the north. The Muckleshoot Indian Reservation is nearby.
Auburn has an extensive system of parks, open space and urban trails comprised of 28 developed parks, over 23 miles (37 km) of trails (including Auburn's 4.5-mile (7.2 km) portion of the Inter-urban Trail for bikers, walkers, runners and skaters), and almost 247 acres (1.00 km²) of open space for passive and active recreation.