Secondary State Highway 1A (Washington)
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State Route 9 (SR 9) is a long
state highway A state highway, state road, or state route (and the equivalent provincial highway, provincial road, or provincial route) is usually a road that is either Route number, numbered or maintained by a sub-national state or province. A road numbered ...
traversing three counties, Snohomish, Skagit, and Whatcom, in the
U.S. state In the United States, a state is a constituent political entity, of which there are 50. Bound together in a political union, each state holds governmental jurisdiction over a separate and defined geographic territory where it shares its so ...
of
Washington Washington most commonly refers to: * George Washington (1732–1799), the first president of the United States * Washington (state), a state in the Pacific Northwest of the United States * Washington, D.C., the capital of the United States ** A ...
. The highway extends north from an interchange with in the vicinity of
Woodinville Woodinville is a city in King County, Washington, United States. The population was 13,069 at the 2020 census. It is a part of the Seattle metropolitan area and is east of Bothell. Woodinville has waterfront parks on the Sammamish River, a wine ...
north through Snohomish,
Lake Stevens Lake Stevens is a city in Snohomish County, Washington, Snohomish County, Washington (state), Washington, United States, that is named for the lake it surrounds. It is located east of Everett, Washington, Everett and borders the cities of Mary ...
,
Arlington Arlington most often refers to: *Arlington, Virginia **Arlington National Cemetery, a United States military cemetery *Arlington, Texas Arlington may also refer to: Places Australia *Arlington light rail station, on the Inner West Light Rail in S ...
,
Sedro-Woolley Sedro-Woolley ( ) is a city in Skagit County, Washington, United States. It is part of the Mount Vernon–Anacortes, Washington Metropolitan Statistical Area and had a population of 12,421 at the 2020 census. The city is home to the admini ...
, and
Nooksack Nooksack ( Nooksack: ''Noxwsʼáʔaq'') or Nootsack may refer to: * Nooksack people, an American Indian tribe in Whatcom County, Washington ** Nooksack language, the language of this tribe Places *Nooksack River, a river in Whatcom County, Washing ...
to become (BC 11) at the Canada–US border in
Sumas Sumas () is a city in Whatcom County, Washington, United States. It had a population of 1,583 as of the 2020 census. Sumas is located adjacent to the Canada–U.S. border and borders the city of Abbotsford, British Columbia. The Sumas–Hunti ...
. Three other roadways are briefly
concurrent Concurrent means happening at the same time. Concurrency, concurrent, or concurrence may refer to: Law * Concurrence, in jurisprudence, the need to prove both ''actus reus'' and ''mens rea'' * Concurring opinion (also called a "concurrence"), a ...
with the route: in Arlington, in Sedro-Woolley, and near Deming. A
spur route A spur route is a short road forming a branch from a longer, more important road such as a freeway, Interstate Highway, or motorway. A Bypass route, bypass or beltway is not considered a spur route as it typically reconnects with another or the ...
in Sumas serves trucks traveling into
British Columbia British Columbia is the westernmost Provinces and territories of Canada, province of Canada. Situated in the Pacific Northwest between the Pacific Ocean and the Rocky Mountains, the province has a diverse geography, with rugged landscapes that ...
. Before SR 9 was created, several other roads used the route of the current highway. The first was a roadway extending from the current southern terminus to Snohomish established by 1895 and another road between Arlington and Sedro-Woolley by 1911. The current SR 542 concurrency was first established in 1925, when a branch of from Bellingham to
Mount Baker Mount Baker (; ), also known as Koma Kulshan or simply Kulshan, is a active glacier-covered andesitic stratovolcano in the Cascade Volcanic Arc and the North Cascades of Washington State in the United States. Mount Baker has the second-most ...
was added to the state highway system. These roads were combined and several other roads were added to create Secondary State Highway 1A (SSH 1A), which originally ran from Woodinville to Blaine in 1937. A branch of SSH 1A connected the mainline to the Canada–US border in Sumas, but was later included into SSH 1A when the Blaine to Sumas segment was deleted in 1953. A highway renumbering in 1964 introduced the sign routes that would be co-signed with the existing system until 1970, one of which would replace SSH 1A, SR 9. SSH 1A / SR 9 extended south to Woodinville until 1965, when it was shortened to , later SR 522, which wasn't complete yet. SR 9 was not complete between Lake Stevens and Arlington until after 1966. Between 2004 and 2009, nine complete construction projects, arranged by the
Washington State Department of Transportation The Washington State Department of Transportation (WSDOT or WashDOT, both ) is a governmental agency that constructs, maintains, and regulates the use of transportation infrastructure in the U.S. state of Washington (state), Washington. Establi ...
(WSDOT), have improved the roadway. The projects ranged from expanding the current
weigh station A weigh station is a checkpoint along a highway to inspect vehicular weights and safety compliance criteria. Usually, trucks and commercial vehicles are subject to the inspection. Weigh stations are equipped with truck scales, some of which are ...
at the Soper Hill Road intersection in 2005 to realigning the highway between Nooksack and Sumas in 2006 to eliminate 90-degree turns. WSDOT is also widening SR 9 in Snohomish County from 2 lanes to a four-lane divided highway. Between 2009 and 2013, WSDOT plans to complete six other projects in Snohomish County to improve the corridor from SR 522 to Bryant. Some projects include widenings, adding a
roundabout A roundabout, a rotary and a traffic circle are types of circular intersection or junction in which road traffic is permitted to flow in one direction around a central island, and priority is typically given to traffic already in the junct ...
at , realignments south of Snohomish and the addition of
web camera A webcam is a video camera which is designed to record or stream to a computer or computer network. They are primarily used in video telephony, live streaming and social media, and security. Webcams can be built-in computer hardware or periphera ...
s.


Route description

SR 9 begins less than north of the
King King is a royal title given to a male monarch. A king is an Absolute monarchy, absolute monarch if he holds unrestricted Government, governmental power or exercises full sovereignty over a nation. Conversely, he is a Constitutional monarchy, ...
Snohomish county line near
Woodinville Woodinville is a city in King County, Washington, United States. The population was 13,069 at the 2020 census. It is a part of the Seattle metropolitan area and is east of Bothell. Woodinville has waterfront parks on the Sammamish River, a wine ...
at a
partial cloverleaf interchange A partial cloverleaf interchange or parclo is a modification of a cloverleaf interchange. The design has been well received, and has since become one of the most popular freeway-to-arterial interchange designs in North America. It has also bee ...
with SR 522. The roadway continues south as Woodinville–Snohomish Road, while SR 522 connects the area to
Seattle Seattle ( ) is the most populous city in the U.S. state of Washington and in the Pacific Northwest region of North America. With a population of 780,995 in 2024, it is the 18th-most populous city in the United States. The city is the cou ...
,
Bothell Bothell () is a city in King and Snohomish counties in the U.S. state of Washington. It is part of the Seattle metropolitan area, situated near the northeast end of Lake Washington in the Eastside region. It had a population of 48,161 residen ...
, and
Monroe Monroe or Monroes may refer to: People and fictional characters * Monroe (surname) * Monroe (given name) * James Monroe, 5th President of the United States * Marilyn Monroe, actress and model Places United States * Monroe, Arkansas, an unincorp ...
. SR 9 travels north along the west side of the Brightwater sewage treatment plant and a community park in Maltby. The four-lane highway continues north and intersects SR 524 at Turners Corner before turning northeast towards Clearview and
Cathcart Cathcart (; , )
is an area of
Snohomish River The Snohomish River is a river in Snohomish County, Washington, formed by the confluence of the Skykomish and Snoqualmie rivers near Monroe. It flows northwest entering Port Gardner Bay, part of Puget Sound, between Everett and Marysville. ...
valley and has several sections with
median barrier A Jersey barrier, Jersey wall, or Jersey bump is a modular concrete or plastic barrier employed to separate lanes of traffic. It is designed to minimize vehicle damage in cases of incidental contact while still preventing vehicle crossovers resu ...
s to form a divided highway. Shortly after passing Cathcart, terminates at the road. SR 9 passes
Harvey Airfield Harvey Airfield, also known as Harvey Field , is a privately owned, public-use airport in Snohomish, Washington, United States, northeast of Seattle. The airfield has one asphalt runway, one turf runway, and fourteen hangar bays. It covers an ...
and crosses another BNSF rail line and the
Snohomish River The Snohomish River is a river in Snohomish County, Washington, formed by the confluence of the Skykomish and Snoqualmie rivers near Monroe. It flows northwest entering Port Gardner Bay, part of Puget Sound, between Everett and Marysville. ...
to enter Snohomish. North of the Snohomish River Bridge, the highway encounters a
diamond interchange A diamond interchange is a common type of road junction, used where a controlled-access highway crosses a minor road. Design The freeway itself is grade separation, grade-separated from the minor road, one crossing the other over a bridge. ...
with 2nd Street and Riverview Road and turns northeast to intersect Bickford Avenue, which once was (US 2). Curving north out of Snohomish, the route interchanges with US 2 in a modified diamond interchange, with a westbound US 2 offramp routed onto New Bunk Foss Road. In suburban West Lake Stevens near the Lake Stevens shoreline, ends at the highway. After the intersection, the roadway had an estimated daily average of 25,000 motorists in 2007, making this stretch of road the busiest on the whole highway. SR 9 also forms the western boundary of
Lake Stevens Lake Stevens is a city in Snohomish County, Washington, Snohomish County, Washington (state), Washington, United States, that is named for the lake it surrounds. It is located east of Everett, Washington, Everett and borders the cities of Mary ...
and the eastern boundary of Marysville while passing a
weigh station A weigh station is a checkpoint along a highway to inspect vehicular weights and safety compliance criteria. Usually, trucks and commercial vehicles are subject to the inspection. Weigh stations are equipped with truck scales, some of which are ...
and the junction. After Lake Cassidy, the road intersects and continues into North Marysville, where the roadway passes over the
Snohomish County Centennial Trail The Snohomish County Centennial Trail is a rail trail in Snohomish County, Washington, connecting the cities A city is a human settlement of a substantial size. The term "city" has different meanings around the world and in some places the ...
. After intersecting at a roundabout, and several residential subdivisions near the Arlington High School, the highway enters downtown
Arlington Arlington most often refers to: *Arlington, Virginia **Arlington National Cemetery, a United States military cemetery *Arlington, Texas Arlington may also refer to: Places Australia *Arlington light rail station, on the Inner West Light Rail in S ...
as Hazel Street. After a brief
concurrency Concurrent means happening at the same time. Concurrency, concurrent, or concurrence may refer to: Law * Concurrence, in jurisprudence, the need to prove both ''actus reus'' and ''mens rea'' * Concurring opinion (also called a "concurrence"), a ...
with , SR 9 crosses the
Stillaguamish River The Stillaguamish River is a river in the northwestern region of the U.S. state of Washington. It is mainly composed of two forks, the longer North Fork Stillaguamish () and the South Fork Stillaguamish. The two forks join near Arlington. Fro ...
and passes Bryant to enter a heavily forested area and leave
Snohomish County Snohomish County () is a county located in the U.S. state of Washington. With a population of 827,957 as of the 2020 census, it is the third-most populous county in Washington, after nearby King and Pierce counties, and the 72nd-most popul ...
. Entering
Skagit County Skagit County is a county in the U.S. state of Washington. As of the 2020 census, the population was 129,523. The county seat and largest city is Mount Vernon. The county was formed in 1883 from Whatcom County and is named for the Upper and ...
, the highway continues northwest through a large forest to Lake McMurray, where it intersects and encounters the Lake McMurray Store, established in 1889. The road passes through Big Lake and its community of the same name before intersecting at a roundabout east of
Mount Vernon Mount Vernon is the former residence and plantation of George Washington, a Founding Father, commander of the Continental Army in the Revolutionary War, and the first president of the United States, and his wife, Martha. An American landmar ...
. Turning northeast to Clear Lake, the route crosses the
Skagit River The Skagit River ( ) is a river in southwestern British Columbia in Canada and northwestern Washington (state), Washington in the United States, approximately 150 mi (240 km) long. The river and its tributaries drain an area of 1.7&nbs ...
into
Sedro-Woolley Sedro-Woolley ( ) is a city in Skagit County, Washington, United States. It is part of the Mount Vernon–Anacortes, Washington Metropolitan Statistical Area and had a population of 12,421 at the 2020 census. The city is home to the admini ...
. In Sedro-Woolley, the street becomes concurrent with and is named Moore Street. At the end of the concurrency, the road turns north as Township Street, paralleling another BNSF rail line, at Cascade Middle School. Continuing north out of the city and into rural areas, SR 9 crosses the
Samish River The Samish River () is approximately 25 miles (40 km) long, in northwestern Washington in the United States. The river drains an area of between the Skagit River basin on the south and the Nooksack River basin on the north. The Samish River ...
and exits Skagit County. The highway enters
Whatcom County Whatcom County (, ) is a county located in the northwestern corner of the U.S. state of Washington, bordered by the Lower Mainland (the Metro Vancouver and Fraser Valley Regional Districts) of the Canadian province of British Columbia to t ...
in a valley located east of
Lake Whatcom Lake Whatcom (from the Lummi dialect, Lummi word for "loud water") is located in Whatcom County, Washington, United States. It is the drinking water source for approximately 85,000 residents in the city of Bellingham, Washington, Bellingham as ...
. Passing
Acme Acme is Ancient Greek (ἀκμή; English transliteration: ''akmē'') for "the peak", "zenith" or "prime". It may refer to: Arts, entertainment and games * ''Acme'' (album), an album by the Jon Spencer Blues Explosion * Acme and Septimius, a fic ...
and crossing the
Nooksack River The Nooksack River is a river in western Whatcom County of the northwestern U.S. state of Washington (state), Washington, draining Nooksack Valley, extensive valley systems within the North Cascades around Mount Shuksan, Mount Baker and the Twin ...
, the roadway becomes concurrent with at a roundabout in Deming. Traveling west with SR 542 along the Nooksack River, the road splits at another roundabout in Cedarville and continues north through a series of 90-degree turns in a plain located near the
Sumas River The Sumas River is a river in the Fraser Lowland and a tributary of the Fraser River system, coursing across the international border between the Canadian province of British Columbia and the U.S. state of Washington. Course The Sumas River or ...
. In
Nooksack Nooksack ( Nooksack: ''Noxwsʼáʔaq'') or Nootsack may refer to: * Nooksack people, an American Indian tribe in Whatcom County, Washington ** Nooksack language, the language of this tribe Places *Nooksack River, a river in Whatcom County, Washing ...
, the route becomes Nooksack Avenue and encounters , named Main Street, which travels west to Everson. North of Nooksack, SR 9 intersects in a rural area and travels northeast along the Sumas River to
Sumas Sumas () is a city in Whatcom County, Washington, United States. It had a population of 1,583 as of the 2020 census. Sumas is located adjacent to the Canada–U.S. border and borders the city of Abbotsford, British Columbia. The Sumas–Hunti ...
. In Sumas, ends at SR 9 and a
spur route A spur route is a short road forming a branch from a longer, more important road such as a freeway, Interstate Highway, or motorway. A Bypass route, bypass or beltway is not considered a spur route as it typically reconnects with another or the ...
that serves trucks branches off and SR 9 terminates at the Canada–US border. The road continues north from the Canada–US border, through Abbotsford, BC to (BC 1), as .


Spur route

Within
Sumas Sumas () is a city in Whatcom County, Washington, United States. It had a population of 1,583 as of the 2020 census. Sumas is located adjacent to the Canada–U.S. border and borders the city of Abbotsford, British Columbia. The Sumas–Hunti ...
, SR 9 has a short
spur route A spur route is a short road forming a branch from a longer, more important road such as a freeway, Interstate Highway, or motorway. A Bypass route, bypass or beltway is not considered a spur route as it typically reconnects with another or the ...
that is used by trucks travelling into
Canada Canada is a country in North America. Its Provinces and territories of Canada, ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, making it the world's List of coun ...
. SR 9 Spur starts at SR 9 (Cherry Street) and travels east as Garfield Street and north as Sumas Avenue to the Canada–US border, where it becomes Boundary Avenue and reconnects back to SR 9's continuation in Canada, Highway 11 (BC 11) in Abbotsford, BC. After the Cherry Street intersection, an estimated daily average of 1,800 motorists used the roadway in 2007.


History

The current route of SR 9 began as a road extending from Grace (today
Woodinville Woodinville is a city in King County, Washington, United States. The population was 13,069 at the 2020 census. It is a part of the Seattle metropolitan area and is east of Bothell. Woodinville has waterfront parks on the Sammamish River, a wine ...
) north to Snohomish, first appearing in an 1895 map. The Snohomish to
Arlington Arlington most often refers to: *Arlington, Virginia **Arlington National Cemetery, a United States military cemetery *Arlington, Texas Arlington may also refer to: Places Australia *Arlington light rail station, on the Inner West Light Rail in S ...
segment was not built until after SR 9, but between Arlington and
Sedro-Woolley Sedro-Woolley ( ) is a city in Skagit County, Washington, United States. It is part of the Mount Vernon–Anacortes, Washington Metropolitan Statistical Area and had a population of 12,421 at the 2020 census. The city is home to the admini ...
, there was a highway by 1911. The first section of the roadway to be included in the state highway system was the current
concurrency Concurrent means happening at the same time. Concurrency, concurrent, or concurrence may refer to: Law * Concurrence, in jurisprudence, the need to prove both ''actus reus'' and ''mens rea'' * Concurring opinion (also called a "concurrence"), a ...
, which became a branch of extending from Bellingham to
Mount Baker Mount Baker (; ), also known as Koma Kulshan or simply Kulshan, is a active glacier-covered andesitic stratovolcano in the Cascade Volcanic Arc and the North Cascades of Washington State in the United States. Mount Baker has the second-most ...
in 1925. Secondary State Highway 1A (SSH 1A) was established in 1937 and ran from (PSH 2) in
Woodinville Woodinville is a city in King County, Washington, United States. The population was 13,069 at the 2020 census. It is a part of the Seattle metropolitan area and is east of Bothell. Woodinville has waterfront parks on the Sammamish River, a wine ...
north to
Sumas Sumas () is a city in Whatcom County, Washington, United States. It had a population of 1,583 as of the 2020 census. Sumas is located adjacent to the Canada–U.S. border and borders the city of Abbotsford, British Columbia. The Sumas–Hunti ...
and west to in Blaine. A branch of SSH 1A connected the main highway to the Canada–US border. Much of the highway was not complete at the time, leading to calls from the Associated Clubs of the North End to accelerate construction to provide an alternate connection to Canada. Between Lynden and
Nooksack Nooksack ( Nooksack: ''Noxwsʼáʔaq'') or Nootsack may refer to: * Nooksack people, an American Indian tribe in Whatcom County, Washington ** Nooksack language, the language of this tribe Places *Nooksack River, a river in Whatcom County, Washing ...
, SSH 1A was realigned in 1951 and in 1953, SSH 1A between Blaine and Sumas was deleted. The corridor was also incorporated into the East Pacific Highway, a designation created in 1951 as an alternative route to US 99 between Tenino and the Canadian border at Sumas. Plans to build a full limited-access highway on the corridor as originally proposed were later dropped by the state government. A section between Snohomish and Lake Stevens was moved to a new, straightened roadway that opened on September 12, 1952. The Lake Stevens–Arlington section of SSH 1A was opened in late 1959, bypassing Jordan Road and the Granite Falls area. became concurrent with SSH 1A in 1957 when it was extended east through Arlington to Darrington. A third concurrency was added in 1961 when was extended west, concurrent in
Sedro-Woolley Sedro-Woolley ( ) is a city in Skagit County, Washington, United States. It is part of the Mount Vernon–Anacortes, Washington Metropolitan Statistical Area and had a population of 12,421 at the 2020 census. The city is home to the admini ...
, to Fredonia. During the 1964 highway renumbering, a new system of highways, sign routes, was introduced and was co-signed with the existing primary and secondary state highways. SSH 1A became SR 9, but SSH 1A was still signed until 1970. In 1965, SSH 1A / SR 9 was shortened from Woodinville to in Grace, which was not complete yet. A plan to truncate SSH 1A to Maltby and build a new highway from Snohomish was proposed in the 1950s but later abandoned. In 1970, SR 202 became . Since 2004, the
Washington State Department of Transportation The Washington State Department of Transportation (WSDOT or WashDOT, both ) is a governmental agency that constructs, maintains, and regulates the use of transportation infrastructure in the U.S. state of Washington (state), Washington. Establi ...
(WSDOT) has completed nine construction projects on SR 9. The Lake Stevens
weigh station A weigh station is a checkpoint along a highway to inspect vehicular weights and safety compliance criteria. Usually, trucks and commercial vehicles are subject to the inspection. Weigh stations are equipped with truck scales, some of which are ...
, located on the west side of the highway at the Sopher Hill Road intersection was expanded to serve two trucks at once in late 2005. The (US 2) interchange was modified to use New Bunk Foss Road as an onramp and traffic signals were added in January 2006. The roadway was repaved between Snohomish and Lake Stevens and also
guardrails Guard rails, guardrails, railings or protective guarding, in general, are a boundary feature and may be a means to prevent or deter access to dangerous or off-limits areas while allowing light and visibility in a greater way than a fence. Commo ...
and turn lanes were added in 2006.< On November 22, 2006, WSDOT opened a new alignment of SR 9 between Nooksack to Sumas that bypassed three 90-degree turns. A
roundabout A roundabout, a rotary and a traffic circle are types of circular intersection or junction in which road traffic is permitted to flow in one direction around a central island, and priority is typically given to traffic already in the junct ...
was added to the intersection east of
Mount Vernon Mount Vernon is the former residence and plantation of George Washington, a Founding Father, commander of the Continental Army in the Revolutionary War, and the first president of the United States, and his wife, Martha. An American landmar ...
in summer 2007. Between SR 522 and , the highway was widened from a 2-lane road to a four-lane divided highway in 2008. A curve on the roadway north of Arlington was straightened in late 2008 and turn lanes were added to two intersections near Bryant.


Future developments

Between 1980 and 2000, the population of
Snohomish County Snohomish County () is a county located in the U.S. state of Washington. With a population of 827,957 as of the 2020 census, it is the third-most populous county in Washington, after nearby King and Pierce counties, and the 72nd-most popul ...
grew by 80 percent, resulting in increased congestion on the two-lane SR 9. Accidents have increased from an average of 325 collisions per year in the 1990s to 450 collisions per year between 2000 and 2007. Since late 2005, WSDOT has been improving the corridor with six projects located between and the
Skagit County Skagit County is a county in the U.S. state of Washington. As of the 2020 census, the population was 129,523. The county seat and largest city is Mount Vernon. The county was formed in 1883 from Whatcom County and is named for the Upper and ...
line that are scheduled to be completed by 2013. South of Snohomish, WSDOT is improving the highway in multiple ways including new intersections and alignments, new
web camera A webcam is a video camera which is designed to record or stream to a computer or computer network. They are primarily used in video telephony, live streaming and social media, and security. Webcams can be built-in computer hardware or periphera ...
s and new turn lanes. Between and Clearview, the 2-lane road is being widened to a four-lane divided highway starting in 2011. The intersection south of
Arlington Arlington most often refers to: *Arlington, Virginia **Arlington National Cemetery, a United States military cemetery *Arlington, Texas Arlington may also refer to: Places Australia *Arlington light rail station, on the Inner West Light Rail in S ...
was scheduled to be rebuilt as a
roundabout A roundabout, a rotary and a traffic circle are types of circular intersection or junction in which road traffic is permitted to flow in one direction around a central island, and priority is typically given to traffic already in the junct ...
in 2011. The roundabout option was chosen over a traffic signal in early October 2009. A route development plan is currently being designed for the highway between SR 522 and Schloman Road north of Arlington. During a project to widen SR 9 in
Lake Stevens Lake Stevens is a city in Snohomish County, Washington, Snohomish County, Washington (state), Washington, United States, that is named for the lake it surrounds. It is located east of Everett, Washington, Everett and borders the cities of Mary ...
, a left-turn lane to Lake Stevens Road was removed in 2009 and residents located on the road have protested. The intersection of SR 9 and SR 204 in Lake Stevens was replaced with a series of four roundabouts that opened in July 2023. WSDOT plans to widen SR 9 near downtown Snohomish to four lanes by building a second bridge over the Snohomish River to carry southbound traffic. The $142 million project is projected to be completed in 2025.


Major intersections


Spur intersections


References


External links


Highways of Washington State
{{DEFAULTSORT:Washington State Route 009
009 009 may refer to: * OO9, gauge model railways * O09, FAA identifier for Round Valley Airport * 0O9, FAA identifier for Ward Field, see List of airports in California * British secret agent 009, see 00 Agent * BA 009, see British Airways Flight ...
Transportation in Snohomish County, Washington Transportation in Skagit County, Washington Transportation in Whatcom County, Washington