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 in Washington
From Ilwaco, US 101 travels northwest into Seaview, where it intersects SR 103 at the foot of Long Beach and turns east onto 40th Street. The highway intersects the north end of the alternate route and crosses northeast over the Bear River and enters the Willapa National Wildlife Refuge. US 101 continues north along the east side of Willapa Bay and crosses the Naselle River before turning east towards Johnston's Landing, where SR 4 terminates.