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.
Washington State Route 105
SR 105 begins at an intersection with US 101 on the north bank of the Willapa River in Raymond, about north of the western terminus of SR 6. The highway follows Park Avenue through Raymond's northern residential neighborhoods and turns southwest to follow the Willapa River downstream and opposite from US 101. It turns northwest to follow the river as it approaches its mouth at the east end of Willapa Bay and passes Willapa Harbor Airport. SR 105 continues west along the Willapa Bay estuary, crossing over North River near the Smith Creek State Wildlife Recreation Area and following the foothills of the Willapa Hills. The highway continues west through the Shoalwater Bay Indian Reservation, located northwest of Tokeland and Dexter by the Sea, and turns north at North Cove on the Pacific Coast.