Except for the most northern reaches of this route that traverses several state routes, the rest of the West Coast Scenic Route in Washington is on US 101, which in Washington amounts to about 366 miles, a route that has existed since 1926. Before US 101 in Washington, State Route 9 and State Route 12 covered the same route.

Upon nearing the end of this route in Washington State, US Highway 101 crosses the mouth of the Columbia River over the Astoria Megler bridge into Oregon, at which time, the West Coast Scenic Route begins its second state as it continues south to the Mexican border.

Side routes are listed in the order of driving northbound from Astoria, Oregon.

There are several Washington State Highways (SH) that offer some additional excursions for views locations. These side routes include the following:

SH 103: At Seaview, Washington, SH 103 leaves left from US 101 and travels north up Long Beach Peninsula to Leadbetter Point State Park. Return is by retracing your route back to Seaview.

SH 105: At Raymond, Washington, after crossing the Willappa river, SH 105 leaves left from US 101 to travel the coast route while US 101 takes a more direct to Aberdeen. SR 105 follows the northeast arm of the Willapa Bay to the west coast and then north to Westport, Washington on the South Bay and Point Chehalis (south jetty) at the mouth of the Chehalis River. Also, in the Westport Light state park can be found the Grays Harbor Lighthouse. Continuing east on SR 105 crosses South Bay and continues on the south side of North Bay through several villages until it connects back with US 101 just before crossing the Chehalis river

SH 109: At Hoquiam, Washington, after crossing the Chehalis river, SH 109 leaves left from US 101 to travel the coast route up to Taholah, Washington on the Quinault river, while US 101 takes an inland passage to the same river at Lake Quinalult. The return from Taholah is back on SH 109 to Hoquiam to connect with US 101 or for the adventurous, there are several county roads available.

SH 110: Just north of Forks, Washington, after crossing the Calawah river leaves left from US 101 and travels 7.75 miles to Mora road which leads right crosses the Sol Duc river and continues five more miles from SH 110 to the Olympic National Park on the coast. SR 110 from Mora road leads to La Push and the Quileute Indian reservation. Return to US 101 is back along SR 110.

SH 113 and SH 112: Just after Beaver, Washington, after crossing the Sol Duc river twice in less than half a mile, SH 113 leaves left from US 101 to travel connect to SH 112, which then travels west along the north coast to Neah Bay, Washington. From SH 112 in Neah Bay, turn left on Fort Street, then right on 3rd Avenue, and then left on Cape Flattery Road. This road crosses to the west side of the cape along a wooded roadway to a parking lot with a vault toilet and a sign nailed to a tree that reads Cape Flattery Trail.

Cape Flattery Trail: From the parking lot, the foot path leads two thousand feet to a fork. To the left a trail leads five hundred feet to an overlook of the inlet. To the right is the main trail which continues twelve hundred feet to a wooden observation deck. Round trip is less than one and a half miles with an elevation gain of 200 feet.

To access any of the Makah Tribal Land, an annual permit is required, currently sold for $20.00 per vehicle and is available at Washburn′s General Store or the Makah Tribal Museum. The permit must be displayed in the window of your vehicle while enjoying any of the trails, beaches and other attractions on the Makah reservation.

Like, the other west coast states, I desire to make this gallery easier to view, so I have divide it into four areas:

Puget Sound Coast: The Puget Sound Coast includes the coastline from Port Townsend to the Canadian Border.

North Coast: The North Coast begins at the Port Townsend Ferry and continues westward to Forks, Washington at where US 101 crosses Division Street.

West Coast: The West Coast begins where US 101 crosses Division Street and continues southward to the Ocean Shores peninsula on the north shore of the Chehalis River.

South Coast: The South Coast begins at Westport on the south shore of the Chehalis river and continues southward to the Astoria-Megler Bridge over the Columbia River.