Historic and Scenic Corridors Project

Cedarhurst Road/Westside Highway

Cedarhurst Road/Westside Highway Heritage Corridor offers the most diverse farm, forest, and marine vistas. Dropping down from the island’s crest to the western shore, the route passes through deep cedar forest before breaking into a patchwork of open farmlands.

• Location: Vashon Island
• Length: 8.2 miles
• Begins: Cedarhurst Road at Vashon Highway
• Ends: Southwest 220th Street

More information about Cedarhurst Road/Westside Highway

• Mile-by-mile tour (1708KB)
• Corridor history (236KB)

Dockton Road

Dockton Road Heritage Corridor winds past beaches, farms, and woods. It offers open views across water, as well as direct access to the shoreline. Dockton Road links the small communities of Ellisport, Portage, and Dockton.

• Location: Vashon-Maury Island
• Length: 4.7 miles
• Begins: Chautauqua Beach Road
• Ends: 99th Avenue Southwest in Dockton

More information about Dockton Road

• Mile-by-mile tour (1782KB)
• Corridor history (316KB) 

Green Valley Road

Green Valley Road Heritage Corridor is a classic farm-to-market road and the longest single road in the Corridor system. It features evolving agricultural land-uses, with scenic historic barns dotting the landscape. You can find seasonal farms and produce stands along the road.

• Location: Southeast King County
• Length: 11.0 miles
• Begins: State Route 18 and Southeast Auburn-Black Diamond Road
• Ends: State Route 169

More information about Green Valley Road

• Mile-by-mile tour (1561KB)
• Corridor history (282KB)

Issaquah-Fall City Road

Issaquah-Fall City Road Heritage Corridor follows the route of the oldest wagon road into the Snoqualmie Valley, pre-dating the arrival of the railroad. This farm-to-market route has connected Fall City to Issaquah since 1883.  This corridor is also unique as it retains the most intact roadway design elements.

• Location: Sammamish Plateau, Snoqualmie Valley
• Length: 4.8 miles
• Begins: Southeast Duthie Hill Road
• Ends: 328th Avenue Southeast in Fall City

More information about Issaquah-Fall City Road

• Mile-by-mile tour (1555KB)
• Corridor history (390KB)

Old Cascade Scenic Highway

The Old Cascade Scenic Highway Heritage Corridor can take you back in time to early 20th century travel in the forested Cascade Range. This corridor includes the remaining sections of the 1914-1925 highway over Stevens Pass. The Old Cascade helps tell the story of the Great Northern Railroad, Stevens Pass Historic District, and logging and mining. It also includes the picturesque town of Skykomish. Today, this corridor is a part of the Stevens Pass Greenway, a National Scenic Byway.

• Location: Northeast King County
• Length: 13.3 miles
• Begins: Stevens Pass Ski Area
• Ends: U.S. Highway 2 (Money Creek Bridge)

More information about Old Cascade Scenic Highway

• Mile-by-mile tour (1660KB)
• Corridor history (322KB)

Old Sunset Highway

The Old Sunset Highway Heritage Corridor paints a picture of the evolution of road development in King County. This corridor offers a taste of early 20th century motoring in a rugged mountain environment. It re-traces the remaining sections of the 1915 automobile route over Snoqualmie Pass. The Old Sunset Highway lies within Mountain-to-Sound Greenway, a National Scenic Byway and is partly under the jurisdiction of Mount Baker-Snoqualmie National Forest.

• Location: Snoqualmie Pass
• Length: 12.8 miles
• Begins: Alpental Access Road
• Ends: Interstate 90

More information about Old Sunset Highway

• Mile-by-mile tour (1962KB)
• Corridor history (450KB)

Old Sunset Highway.

Osceola Loop

The Osceola Loop Heritage Corridor on historic Porter's Prairie has the oldest road in the system. Osceola Loop showcases both the best and the least developed scenic routes on the Enumclaw Plateau. This corridor provides sweeping views across open dairy and horse farms toward Mount Rainier in the distance. You can also find 2 historic schools and a pickle factory in this former agricultural intersection.

• Location: Southeast King County
• Length: 11.0 miles
• Begins: State Route 18 and Southeast Auburn-Black Diamond Road
• Ends: State Route 169

More information about Osceola Loop

• Mile-by-mile tour (1200KB)
• Corridor history (240KB)

West Snoqualmie River Road

Let the Snoqualmie River Road Heritage Corridor take you back to the early 20th century. Back then, the valley seemed miles from the city. This corridor is located in a hidden pocket of the valley, close to the winding river. It offers peaceful ambience and minimal traffic in a lovely, rustic setting. The specialty farms located here also get quite a bit of interest.

• Location: Snoqualmie Valley
• Length: 5.8 miles
• Begins: Tolt Hill Road
• Ends: State Route 202

More information about West Snoqualmie River Road

• Mile-by-mile tour (1767KB)
• Corridor history (260KB)

West Snoqualmie Valley Road / Carnation Farm Road

The Snoqualmie Valley Road Heritage Corridor presents a 12-mile view of the Snoqualmie Valley. This corridor stretches along the western hillside and overlooks the valley floor. Experience pastoral views toward the Cascade Mountains and the iconic Carnation Farms.

• Location: Southeast King County
• Length: 11.0 miles
• Begins: State Route 18 and Southeast Auburn-Black Diamond Road
• Ends: State Route 169

Learn more about West Snoqualmie Valley Road/Carnation Farm Road

• Mile-by-mile tour (1433KB)
• Corridor history (344KB)