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
Entering Washington State at the north end of the Astoria–Megler Bridge west of Megler at the intersection with SR 401, US 101 follows the northern banks of the Columbia River until Ilwaco. At this point it turns to the northeast and follows the shore of Willapa Bay and the Willapa River as far as Raymond, from which it proceeds directly north to Aberdeen, offering access from this city into the Olympic National Park. While the AAA has designated this segment north and then east to Port Angeles and Sequim as a scenic byway, some clear-cut logging in the early 1990s has diminished the scenic value of the highway where it crosses the Quinault Indian Reservation and the Olympic National Forest.