U.S. Route 101
The nearly highway's northern terminus is in Tumwater, Washington: the route remains along the Olympic Peninsula's coastal perimeter west, north, and east; the northernmost point on the highway is in Port Angeles. The southern terminus of US 101 is in Los Angeles at the East Los Angeles Interchange, the world's busiest freeway interchange.
U.S. Route 101
Between the intersection with SR 113, on the western edge of the Olympic Mountains, US 101 is signed east–west, and roughly south of the intersection with SR 20, US 101 is signed north–south but having turned around 180°. The direct route between the towns of Aberdeen (on the coast) and Olympia is US 12 and SR 8.