Washington State Route 11

State Route 11
Chuckanut Drive
Map of Skagit and Whatcom counties with SR 11 highlighted in red
Route information
Defined by RCW 47.17.050
Maintained by WSDOT
Length:	21.28 mi (34.25 km)
Existed:	1964 – present
Major junctions
South end:	I‑5 in Burlington
North end:	I‑5 in Bellingham
Location
Counties:	Skagit, Whatcom
Highway system
State highways in Washington Interstate US State Scenic Former PSH 1964 renumbering Former ← SR 10 US 12 →

U.S. Route 99 Alternate
Location:	Burlington–Bellingham
Existed:	1937–1967

State Route 11 (SR 11) is a 21.28-mile (34.25 km) long state highway that serves Skagit and Whatcom counties in the U.S. state of Washington. SR 11, known as Chuckanut Drive, begins at an interchange with Interstate 5 (I-5) north of Burlington and continues northwest through several small towns and the Chuckanut Mountains to the Fairhaven district of Bellingham, where the highway turns east and ends again at I-5.

A segment of what is now SR 11 was originally added to the state highway system in 1895 as a Blanchard – Whatcom County line road. The highway became State Road 6 in 1905 and was named Waterfront Road in 1907. The road was incorporated into the Pacific Highway in 1913 and U.S. Route 99 (US 99) in 1926. After an inland bypass was designated by the state to become US 99 in 1931, Chuckanut Drive became U.S. Route 99 Alternate. During the 1964 highway renumbering, the road became SR 11. In 1987, SR 11 was realigned through Bellingham, shifting its northern terminus south to Fairhaven.

SR 11, named Chuckanut Drive for its whole route, begins at a partial cloverleaf interchange with I-5 north of Burlington. From the interchange, the highway travels northwest through farmland, closely paralleling a BNSF Railway route from Mount Vernon to Bellingham, also used by the Amtrak Cascades service. The road turns north to intersect Bow Hill Road, formerly SR 237 until 1991, east of Edison. SR 11 continues north to Blanchard, where it begins to traverse a narrow strip of land between the Chuckanut Mountains and Samish Bay. Midway between Blanchard and the Skagit–Whatcom county line, the highway travels through a hairpin turn at Oyster Creek.