Interstate 5 in Washington

Interstate 5
Interstate 5 is highlighted in red
Route information
Defined by RCW 47.17.020
Maintained by WSDOT
Length:	276.62 mi[1][2] (445.18 km)
Existed:	August 7, 1947 by FHWA 1956 – present
Tourist routes:	Lewis and Clark Highway (from Vancouver to SR-4 near Longview)[3]
Major junctions
South end:	I-5 at the Oregon state line
	SR 14 in Vancouver I‑205 in Salmon Creek US 12 near Centralia US 101 in Tumwater I‑705 in Tacoma I‑90 in Seattle US 2 in Everett SR 20 in Burlington
North end:	BC 99 at Canada–United States border in Blaine
Location
Counties:	Clark, Cowlitz, Lewis, Thurston, Pierce, King, Snohomish, Skagit, Whatcom
Highway system
Interstate Highway System Main Auxiliary Suffixed Business State Highways in Washington Interstate US State Scenic Former PSH 1964 renumbering Former ← SR 4 SR 6 →

Interstate 5 in Washington (I-5) is a 276.62-mile (445.18 km) highway in the U.S. state of Washington that extends from its border with Oregon to its border with Canada. Serving the cities of Vancouver, Kelso, Chehalis, Centralia, Olympia, Tacoma, Seattle, Everett, Mount Vernon, and Bellingham, it is the main route between Portland, Oregon, and Vancouver, British Columbia.^[4][5][6]

It is the only interstate to traverse the whole north–south length of Washington, but the undivided highways U.S. Route 97 and U.S. Route 395 do also.^[7][8] I-5 is also the only north–south primary interstate highway in Washington.^[9][10] The road is the busiest in the state; an estimated 240,000 motorists use the road daily.^[11] The second busiest is I-405 at 201,000.^[12]

Route description

Vancouver to Tumwater

The Interstate Bridge carries I-5 over the Columbia River from Portland to Vancouver.

I-5 enters Washington at the Interstate Bridge over the Columbia River between Portland and Vancouver. It initially heads north through Vancouver and intersects SR 14, the first segment of SR 501, and SR 500 until the interchange with I-205 in Salmon Creek, where the freeway begins a turn to the northeast. I-5 closely follows the alignment of old U.S. Route 99, and in some locations the US 99 alignment has become I-5. The interstate passes the Vancouver branch of Washington State University. Southeast of Ridgefield, the highway intersects SR 502 and the second segment of SR 501 before continuing north along the Columbia River to Woodland.^{[13][14][15][16][16][17]}

In Woodland, I-5 intersects SR 503 and starts to curve northwest towards Longview and Kelso. At Longview Junction, east of Longview, I-5 intersects SR 432 and continues north to Kelso. Here it intersects SR 4, formerly US 830, and SR 431 before curving northeast towards Castle Rock. In Castle Rock, the freeway intersects SR 411, and SR 504, which connects I-5 with Mount St. Helens, and Spirit Lake. From Castle Rock, the highway goes north to Napavine and intersects SR 506 and SR 505 before becoming concurrent with US 12 and continuing north to intersect SR 508. After the intersection, I-5 and US 12 go into Chehalis, where the highway intersects SR 6.^[16][18][19]

After leaving Chehalis, I-5/US 12 enters Centralia and intersects SR 507 before splitting from US 12 north of the city. As the freeway continues north towards Olympia, it intersects SR 121, which connects the highway with Millersylvania State Park and loops back to I-5. As the freeway enters Tumwater, it passes the Olympia Airport before intersecting the northern terminus of US 101.^{[5][16][20][21][22][23][24]}

Tumwater to Tukwila

Interstate 5 through Lacey, with Mount Rainier in the background

As I-5 leaves the US 101 interchange, the highway curves east and forms the southern boundary of Olympia. The highway also goes across Capitol Lake and intersects Capitol Way, which connects the freeway to the Washington State Capitol. After leaving Olympia, I-5 goes in a northeastern direction into Lacey, where it intersects SR 510. After passing Nisqually, the highway enters Du Pont, where it enters Fort Lewis. After passing Camp Murray and American Lake, the freeway comes to the proposed western terminus of SR 704, passes McChord Air Force Base, and enters Lakewood.^[16]

In Lakewood, I-5 intersects SR 512 and continues into Tacoma, where the freeway passes the Tacoma Mall and intersects major highways, such as SR 16, I-705, SR 7, and SR 167 before going east into Fife. In Fife, the highway intersects SR 99, a small portion of US 99 through the Puget Sound region, and then enters Federal Way. Here the freeway intersects the western terminus of SR 18, which has been proposed to be renumbered to I-605 after being upgraded to Interstate standards.

After also intersecting SR 516, the highway passes Angle Lake, the Seattle-Tacoma International Airport, and Westfield Southcenter before going into an interchange with I-405 and SR 518. SR 518 connects I-5 to the Seattle-Tacoma International Airport, and I-405 bypasses I-5 through Seattle.^{[5][16][25][26][27][28][29][30]}

Tukwila to Shoreline

The interchange between Interstate 5 and Interstate 90 in south Seattle

From the I-405/SR 518 interchange, I-5 goes north and intersects SR 599, which connects I-5 to SR 99, and SR 900. From the interchanges, the highway passes Boeing Field and the West Seattle Bridge before having a large interchange with I-90. After the interchange, I-5 intersects SR 519 and enters Seattle.

Freeway Park.

In downtown Seattle, I-5 becomes a tunnel passing under the Washington State Convention and Trade Center and Freeway Park. Once I-5 begins to rise from the tunnel, it passes over the I-5 Colonnade and then intersects the western terminus of SR 520, which goes to Bellevue via the Evergreen Point Floating Bridge. From the interchange with SR 520, the freeway goes north along the Ship Canal Bridge over the Lake Washington Ship Canal and passes the University of Washington before entering Northgate.

Within the neighborhood of Northgate, the highway intersects SR 522 and merges with the I-5 express lanes at the Northgate Mall. From the Northgate Mall, I-5 goes north into Shoreline and intersects SR 523 and passes a King County Metro Transit base before intersecting SR 104 and entering Mountlake Terrace.^{[5][30][31][32][33]}

Seattle express lanes

The express lanes on the Ship Canal Bridge

Interstate 5 has 7.14 miles (11.49 km)^[2] of reversible express lanes within Seattle. The express lanes begin after the Yesler Way bridge and tunnel under the northbound lanes of I-5 and intersect Cherry Street/Columbia Street. From the interchange, the express lanes intersect Mercer Street and then cross the Ship Canal Bridge. The express lanes are on the lower deck below the lanes of I-5. Near the end of the bridge is a reversible ramp that accesses Northeast 42nd Street. After the bridge ends, the express lanes continue northbound and intersect with Ravenna Boulevard, Lake City Way, and Northeast 103rd Street/1st Avenue Northeast. Finally, the lanes merge with I-5 in Northgate just north of the Northgate Mall.^{[5][30][32][34][35]}

The express lanes are open to all traffic; however, some ramps are designated for HOV vehicles only to assist with traffic flow and mitigate constrained space. These ramps include Cherry Street/Columbia Street/5th Avenue, Ravenna Boulevard, and Pike Street/Downtown Seattle Transit Tunnel. The express lanes carry northbound traffic from 12pm to 11pm Monday through Friday and 2pm to 11pm Saturday and Sunday. They carry southbound traffic from 5 am to 11am Monday through Friday and from 7am to 1pm Saturday and Sunday.^[36][37]

Shoreline to Everett

Interstate 5 passing by the South Everett Freeway Station, under construction near Silver Lake

After leaving Shoreline and intersecting SR 104, I-5 enters Snohomish County and Mountlake Terrace. From the interchange, the highway passes Lake Ballinger and intersects SR 524 before reaching the Alderwood Mall. Next to the mall, the freeway intersects SR 525 and I-405. From the interchange, I-5 passes Martha Lake, intersects SR 96, and passes Silver Lake before reaching the interchange between I-5, SR 99, SR 526, and SR 527 near the Everett Mall. SR 99 is part of Old US 99, SR 526 connects I-5 to the Boeing Everett Factory, and SR 527 connects Bothell with Everett.

After leaving the interchange, I-5 intersects 41st Street at a single-point urban interchange, the only one in the area. From the interchange, the freeway intersects SR 529 and then SR 529 Spur and US 2.^{[5][16][33][38][39]}

Everett to Mount Vernon

I-5 southbound viewed from the newly upgraded SR 531 in Marysville

After leaving downtown Everett and the US 2/SR 529 Spur interchange, I-5 goes north across the Snohomish River and curves northeast to an interchange with SR 529. North of the interchange, the freeway enters Marysville and intersects SR 528. The highway passes the Tulalip Resort Casino at Quil Ceda, commonly known as the Quil Ceda Creek Casino, the Marysville Water Tower, Quil Ceda Village, the Tulalip Resort Casino and Tulalip Hotel, and Lakewood Crossing before intersecting SR 531 and leaving Marysville. From the Marysville City limits, I-5 passes Smokey Point and goes northwest to Island Crossing, where the highway intersects SR 530, which connects the freeway to Arlington, Darrington, and Rockport.

After the interchange, I-5 travels over the Stillaguamish River and passes Silvana before intersecting SR 532, which goes west to Stanwood and Camano Island. As the highway curves northwest, the freeway enters Skagit County. Once in Skagit County, I-5 goes into Conway, where it intersects SR 534, which goes east to serve Big Lake. From Conway, the freeway goes north into Mount Vernon, where I-5 intersects SR 536, which serves as a shortcut to Anacortes, via SR 20 and SR 20 Spur.^{[5][16][40][41] [42]}

Mount Vernon to Blaine

The Peace Arch is a monument on the Canadian border, where I-5 becomes Hwy 99 and enters British Columbia.

After leaving downtown Mount Vernon, the freeway intersects SR 538, which serves the Skagit Valley College and Clear Lake (via SR 9). After the interchange, the highway crosses the Skagit River, where part of the bridge collapsed on May 23, 2013, leaving a gap in the highway until a temporary bailey bridge span was built and opened on June 19. In September it was replaced with a more permanent span. On the other side of the river it continues north through Burlington. After passing the Cascade Mall, I-5 intersects SR 20, which goes west to Anacortes (via SR 20 Spur), Deception Pass, Whidbey Island, and Discovery Bay and SR 20 goes east to Okanogan, Omak, and Newport.^[43] The freeway also intersects SR 11, which serves Edison, Bow, Samish Island, and Bellingham.

From the interchange, I-5 travels north and curved west on the shoreline of Lake Samish north of Alger, which is also the point where the freeway enters Whatcom County. After traveling west, I-5 curves north again and intersects SR 11 before entering Bellingham. In Bellingham, the highway intersects SR 542, which goes to Mount Baker, and SR 539, which goes to Lynden and British Columbia. The freeway passes the Bellis Fair Mall, Bellingham International Airport, and Ferndale before intersecting SR 548, which serves Blaine. Once in Blaine, I-5 intersects SR 543, which leads to the truck and freight border crossing. The freeway then intersects SR 548 again and then crosses the Canadian border into British Columbia as Highway 99 at the Peace Arch.^{[5][16][30][41][44][45][46]}

History

The shields for Primary State Highway 1 and U.S. Route 99.

As part of the state's first connected state highway system, the Washington State Legislature designated the Pacific Highway between Vancouver and Blaine in 1913.^[47][48] The State Highway Board selected a route that would connect the main cities of Western Washington, which were Vancouver, Olympia, Tacoma, Seattle, Everett, and Bellingham.^[49][50] In 1923, by which time the entire road had been improved,^[51] the highway became State Road 1 (Primary State Highway 1 after 1937), but retained its name.^[52] By that time, most of the route of Interstate 5 became US 99, which was established in 1926.^[53][54][55]

Later in 1956, President Dwight D. Eisenhower signed the Federal-Aid Highway Act of 1956 which started the construction of Interstate Highways.^[56][57] In 1968, US 99 was removed from the system entirely, a year before the last portion of Interstate 5 opened on November 14, 1969.^[58] Legally, the Washington section of I-5 is defined at Washington Revised Code § 47.17.020.^[59] Several projects are currently ongoing and have been completed in the recent years on I-5.^[60]

Kelso to Centralia

Flooding near Chehalis closed I-5 for four days in December 2007.

During the past two decades, parts of the interstate have been periodically inundated by floodwaters as a result of area storms. Floods in November 1990, February 1996, December 2007, and January 2009^[61] each caused temporary closures of I-5 between the Kelso-Longview and Chehalis-Centralia areas. The causes of this problem, as noted by the United States Army Corps of Engineers, are attributable to "decades of clear-cut logging, modifications of waterways, and destruction of natural flood control features within the Chehalis River basin."^[62]

The December 3, 2007, flood closed a 20-mile (32 km) section of the interstate for four days. The Washington State Department of Transportation recommended a 440-mile (710 km) detour between Portland and Seattle, by way of I-90, I-82, and I-84, adding 270 miles (430 km) to the 170-mile (270 km) trip.^[63][64][65]

The January 7, 2009 flood closed a 20-mile (32 km) section of the interstate for several days. The Washington State Department of Transportation was unable to offer a detour since all three main east/west passes were also closed due to severe mudslide and avalanche danger.

Seattle

Interstate 5 cutting through the Seattle skyline

South of the Ship Canal Bridge Interstate 5 separates the Eastlake and Cascade neighborhoods from the Capitol Hill neighborhood, and separates Downtown Seattle from the Capitol Hill and First Hill neighborhoods. Its construction necessitated the demolition of significantly developed areas and cut off walking commutes to downtown for many First Hill residents, who "were by far the most vociferous critics of the proposed route,"^[66] but far from the only ones. Architect Paul Thiry said in the early 1970s, "It was with the Freeway, cutting through the very heart of the city, that Seattle began taking one of its wrong turns and started to lose its identity as a city." He proposed a lid extending from Columbia Street north to Olive Way, roughly the entire length of downtown.^[67]

Among the buildings torn down in the Downtown-First Hill area to build the freeway was the Hotel Kalmar at Sixth Avenue and James Street (built 1881 as the Western Hotel, demolished 1962), the last of Seattle's pioneer-era hotels, predating the Great Seattle Fire,^[68][69] and Seattle's then-oldest public building, the Seventh Avenue Fire Hall (built 1890, demolished c. 1962).^[66]

In the years since the freeway's construction, Seattle has made several efforts to stitch back together pedestrian routes disrupted by the freeway, achieving part of Thiry's proposed "lid". The most visible of these efforts are Freeway Park (opened 1976), built as a lid over the freeway and connecting Downtown to First Hill, and the Washington State Convention and Trade Center (built 1982-1988) adjacent to Freeway Park, also bridging the freeway.^[66] The 7.5-acre (30,000 m²) I-5 Colonnade mountain bike park (opened 2007) uses the freeway as a roof and reconnects Eastlake to Capitol Hill.^[70]

The Interstate 5 separates Capitol Hill (right) from South Lake Union (center) and Downtown Seattle (left).

On Interstate 5, the only planned improvement on the express lanes is a direct connection to the future SR 520 HOV lanes, to be constructed as part of the Evergreen Point Floating Bridge replacement project.

Signage for Seattle and Vancouver in Northwestern Washington.

Seattle to Everett

The 19.7 miles (31.7 km) section between Seattle and Everett was opened on February 3, 1965 by Miss Sno-King Rose Clare Menalo of Meadowdale High School.^[71][72]

Everett to Mount Vernon

The portion of I-5 from US 2 / SR 529 Spur in Everett to SR 528 in Marysville opened at a ribbon-cutting ceremony on May 14, 1969 by Devvie Herivel, Miss Everett, and Katherine Smith, Miss Marysville. This was the last portion of Interstate 5 from California to Canada that was opened, free of traffic lights and draw bridges.^[73] The stretch of I-5 from Marysville to Mount Vernon was already opened as a 4-lane divided highway without overpasses.^[74]

On May 23, 2013, the northbound span of the I-5 Skagit River bridge between Mt. Vernon and Burlington collapsed.^[75]

Exit list

County	Location	mi[2]	km	Exit	Destinations	Notes
Columbia River		0.00	0.00	Interstate Bridge I-5 continues south into Oregon towards Portland
Clark	Vancouver	0.41	0.66	1A	SR 14 east – Camas
		0.45	0.72	1B	6th Street – Vancouver City Center	Northbound exit and southbound entrance
		1.05	1.69	1C	SR 501 (Mill Plain Boulevard) – Vancouver City Center, Port of Vancouver
		1.58	2.54	1D	4th Plain Boulevard
		2.35	3.78	2	SR 500 east / 39th Street
		3.07	4.94	3	Northeast Highway 99, Main Street
		4.36	7.02	4	Northeast 78th Street
		5.39	8.67	5	Northeast 99th Street
		7.24	11.65	7A	Northeast 134th Street	Northbound exit and southbound entrance; southbound exit is via I-205
				7B	Northeast 139th Street	No southbound exit
		7.48	12.04	7	I‑205 south / Northeast 134th Street – Salem	Southbound exit and northbound entrance
		9.51	15.30	9	Northeast 179th Street – Clark County Fairgrounds
		11.20	18.02	11	SR 502 east (Northeast 219th Street) – Battle Ground
	Ridgefield	14.21	22.87	14	SR 501 west (Pioneer Street) – Ridgefield
		16.80	27.04	16	Northwest La Center Road – La Center
Cowlitz	Woodland	21.08	33.92	21	SR 503 east – Woodland, Cougar
		22.72	36.56	22	Dike Access Road
		27.70	44.58	27	Todd Road – Port of Kalama
	Kalama	29.84– 30.64	48.02– 49.31	30	Kalama
		32.28	51.95	32	Kalama River Road
	Kelso	36.97	59.50	36	SR 432 west to SR 4 / US 30 – Longview, Long Beach, Kelso
		39.88	64.18	39	SR 4 west (Allen Street) – Kelso
		40.77	65.61	40	To SR 4 / North Kelso Avenue – Kelso, Longview, Long Beach
		42.73	68.77	42	Sparks Drive, Pleasant Hill Road
		46.20	74.35	46	Headquarters Road
	Castle Rock	48.04	77.31	48	I‑5 Bus. north (Huntington Avenue) – Castle Rock
		49.91	80.32	49	SR 411 south (I-5 Bus. south) / SR 504 east – Castle Rock, Toutle
		52.72	84.84	52	Barnes Drive, Toutle Park Road
Lewis		57.41	92.39	57	Jackson Highway, Barnes Drive
		59.27	95.39	59	SR 506 west – Vader, Ryderwood
		60.98	98.14	60	Toledo Vader Road
		63.49	102.18	63	SR 505 – Winlock, Toledo
		68.48	110.21	68	US 12 east – Yakima, Morton	South end of US 12 overlap
	Napavine	71.12	114.46	71	SR 508 east – Onalaska, Napavine
		72.85	117.24	72	Rush Road
	Chehalis			74	Labree Road
		76.62	123.31	76	13th Street
		78.04	125.59	77	SR 6 west – Pe Ell, Raymond
		79.15	127.38	79	Chamber Way
	Centralia	81.74	131.55	81	SR 507 north (Mellen Street)
		82.80	133.25	82	Harrison Avenue, Factory Outlet Way
Thurston		88.40	142.27	88	US 12 west – Aberdeen, Tenino	North end of US 12 overlap
		95.28	153.34	95	SR 121 north – Littlerock, Maytown
		99.35	159.89	99	SR 121 south (93rd Avenue)
	Tumwater	101.37	163.14	101	Tumwater Boulevard – Olympia Airport
		102.86	165.54	102	Trosper Road – Black Lake
		104.05	167.45	103	Deschutes Way, 2nd Avenue	No southbound entrance
		104.39	168.00	104	US 101 north – Aberdeen, Port Angeles
	Olympia	105.52	169.82	105A	State Capitol, Olympia City Center	Signed as exit 105 northbound
		105.82	170.30	105B	Port of Olympia	Signed as exit 105 northbound
		107.52	173.04	107	Pacific Avenue
	Lacey	108.46	174.55	108A	Sleater–Kinney Road south	No northbound entrance; signed as exit 108 southbound
		108.46	174.55	108B	Sleater–Kinney Road north	No northbound entrance; southbound exit is via exit 109
		108.96	175.35	108C	College Street	Northbound exit only
		109.19	175.72	109	Martin Way
		112.01	180.26	111	SR 510 east (Marvin Road) – Yelm
		114.36	184.04	114	Nisqually, Old Nisqually
Pierce		116.77	187.92	116	Mounts Road – Old Nisqually
	DuPont	118.02	189.93	118	Center Drive
		119.07	191.62	119	Steilacoom–DuPont Road
		120.93	194.62	120	Joint Base Lewis–McChord
	Lakewood	122.74	197.53	122	Berkeley Street
		123.64	198.98	123	Thorne Lane
		124.70	200.69	124	Gravelly Lake Drive
		125.92	202.65	125	Bridgeport Way – McChord Field
		127.54	205.26	127	SR 512 east / South Tacoma Way – Puyallup
		128.98	207.57	128	South 84th Street	Southbound exit is via exit 129
	Tacoma	129.65	208.65	129	South 72nd Street
		130.75	210.42	130	South 56th Street, Tacoma Mall Boulevard
		131.89	212.26	132	SR 16 west (South 38th Street) – Gig Harbor, Bremerton, Tacoma Mall
		133.76	215.27	133	I‑705 north / SR 7 south – Tacoma City Center
		134.93	217.15	134	Portland Avenue	Southbound exit is via exit 135
		135.09	217.41	135	SR 167 north – Puyallup
	Fife	136.15	219.11	136	20th Street East – Port of Tacoma	Signed as exits 136A (20th Street) and 136B (Port of Tacoma) northbound
		137.51	221.30	137	SR 99 north – Milton, Fife
King	Federal Way	142.06	228.62	142	SR 18 (South 348th Street) – North Bend, Auburn	Signed as exits 142A (east) and 142B (west)
		143.89	231.57	143	South 320th Street – Federal Way
		144.08	231.87	—	South 317th Street	HOV only
	Kent	146.87	236.36	147	South 272nd Street
		149.23	240.16	149	SR 516 – Kent, Des Moines	Signed as exits 149A (east) and 149B (west) northbound
	SeaTac	151.24	243.40	151	Military Road, South 200th Street
		152.32	245.14	152	South 188th Street, Orillia Road South
	Tukwila	154.19	248.14	153	Southcenter Parkway – Southcenter Mall	Northbound exit and southbound entrance
		154.46	248.58	154	I‑405 north / SR 518 west – Sea-Tac Airport, Renton, Burien	Signed as exits 154A (I-405) and 154B (SR 518) southbound
		154.71	248.98	154B	Southcenter Boulevard – Southcenter Mall	Southbound exit and northbound entrance
		156.00	251.06	156	SR 599 north (West Marginal Way) / Interurban Avenue – Tukwila
		157.40	253.31	157	SR 900 east (M. L. King Way)
		158.07	254.39	158	Boeing Access Road, East Marginal Way, Airport Way
	Seattle	161.27	259.54	161	Swift Avenue, Albro Place
		161.37– 161.60	259.70– 260.07	162	Corson Avenue, Michigan Street
		163.03	262.37	163A	Columbian Way, West Seattle Bridge	Signed as exit 163 northbound
		163.54	263.19	163B	Forest Street, 6th Avenue South	Southbound exit only
				164	Airport Way	Southbound exit only
		164.55	264.82	164A	I‑90 east – Bellevue, Spokane	Signed as exit 164 southbound; I-90 east exit 2A-B; west exit 2B-C
		164.55	264.82	164B	4th Avenue South / South Atlantic Street (SR 519)	Signed as exit 164 southbound
		164.68	265.03	164	Dearborn Street	Signed as exit 164A northbound; no southbound entrance
		165.35	266.11	—	Express Lanes	Northbound exit and southbound entrance
		165.38	266.15	165A	James Street	Signed as exit 164A northbound
		165.63	266.56	164A	Madison Street – Convention Center	Northbound exit only
		165.75	266.75	165	Seneca Street	Northbound exit and southbound entrance
		165.81	266.85	165B	Union Street	Southbound exit and northbound entrance
		166.26	267.57	166	Olive Way	Northbound exit and entrance
		166.42	267.83	166	Stewart Street, Denny Way	Southbound exit and entrance
				167	Mercer Street – Seattle Center
		167.73	269.94	168A	Lakeview Boulevard	Northbound exit and southbound entrance
		168.12	270.56	168B	SR 520 – Bellevue, Kirkland
		168.18	270.66	168A	Boylston Avenue, Roanoke Street	Southbound exit and northbound entrance
		169.44	272.69	169	Northeast 45th Street
		169.69	273.09	169	Northeast 50th Street
		170.31	274.09	170	Ravenna Boulevard, Northeast 65th Street	Northbound exit and southbound entrance
		170.70	274.72	171	Northeast 71st Street, Northeast 65th Street	Southbound exit and northbound entrance
		170.87	274.99	171	SR 522 (Lake City Way) – Bothell	Northbound exit and southbound entrance
		171.56	276.10	172	North 85th Street, Aurora Avenue North (SR 99), Northeast 80th Street
		172.58	277.74	—	Express Lanes	Southbound exit and northbound entrance
		172.82	278.13	173	1st Avenue Northeast, Northgate Way
		173.89	279.85	174	Northeast 130th Street, Roosevelt Way	Northbound exit and southbound entrance
	Seattle–Shoreline city line	174.64	281.06	175	SR 523 (Northeast 145th Street) / 5th Avenue Northeast
	Shoreline	175.58	282.57		Metro Transit Base	Transit Base traffic only
		176.19	283.55	176	Northeast 175th Street – Shoreline
King–Snohomish county line	Shoreline–Mountlake Terrace city line	177.81	286.16	177	SR 104 (Northeast 205th Street) – Edmonds, Lake Forest Park
Snohomish	Mountlake Terrace	178.33	286.99	178	236th Street Southwest – Mountlake Terrace	Northbound exit and southbound entrance
		179.35	288.64	179	220th Street Southwest – Mountlake Terrace
	Lynnwood	180.69	290.79	—	46th Avenue West (Lynnwood Transit Center)	HOV only
		180.77	290.92	181A	To SR 524 / 44th Avenue West – Lynnwood	Northbound exit and southbound entrance
		181.59	292.24	181B	SR 524 (196th Street Southwest) / Alderwood Mall Parkway – Lynnwood	Signed as exit 181 southbound
		182.67	293.98	182	I‑405 south – Renton, Bellevue
		182.67	293.98	182	SR 525 north to SR 99 – Mukilteo	Northbound exit and southbound entrance
		183.96	296.05	183	164th Street Southwest
		184.21	296.46		Ash Way	Northbound exit and southbound entrance (buses only)
		186.49	300.13	186	SR 96 east (128th Street Southwest)
	Everett	187.80	302.23	—	112th Street Southeast	HOV only
		189.37	304.76	189	SR 99 south (Everett Mall Way) / SR 526 west / SR 527 south / Broadway – Mukilteo, Whidbey Island Ferry
		192.51	309.81	—	Broadway	Northbound exit only (HOV only)
		192.72	310.15	192	41st Street, Evergreen Way
		193.69	311.71	193	SR 529 (Pacific Avenue) – Everett City Center	Northbound exit and southbound entrance
		193.98	312.18	194	US 2 east – Snohomish, Wenatchee
		194.08	312.34	194	SR 529 (Everett Avenue) – Everett City Center	Southbound exit and northbound entrance
		194.87	313.61	195	Marine View Drive – Port of Everett	Northbound exit and southbound entrance
		198.33	319.18	198	SR 529 south (North Broadway) – Port of Everett	Southbound exit and northbound entrance
		199.17	320.53	199	SR 528 east – Marysville, Tulalip
		200.84	323.22	200	88th Street Northeast, Quil Ceda Way
		202.52	325.92	202	116th Street Northeast
	Arlington	206.13	331.73	206	SR 531 (172nd Street Northeast) – Smokey Point
		208.72	335.90	208	SR 530 – Silvana, Arlington, Darrington
		210.36	338.54	210	236th Street Northeast
		212.71	342.32	212	SR 532 west – Stanwood, Camano Island
		215.09	346.15	215	300th Street Northwest
Skagit		218.61	351.82	218	Starbird Road
		221.13	355.87	221	SR 534 east – Lake McMurray
		224.00	360.49	224	Old Highway 99 South	Northbound exit and southbound entrance
	Mount Vernon	225.19	362.41	225	Anderson Road
		226.45	364.44	226	SR 536 west (Kincaid Street)
		227.79	366.59	227	SR 538 east (College Way)
	Skagit River Bridge
	Burlington	228.93	368.43	229	George Hopper Road
		230.20	370.47	230	SR 20 – Anacortes, Burlington
		231.27	372.19	231	SR 11 north (Chuckanut Drive) – Bow, Edison, Burlington
		232.89	374.80	232	Cook Road – Sedro-Woolley
		236.45	380.53	236	Bow Hill Road – Bow, Edison
		240.99	387.84	240	Alger
Whatcom		242.92	390.94	242	Nulle Road – South Lake Samish
		246.30	396.38	246	North Lake Samish
	Bellingham	250.79	403.61	250	SR 11 south (Old Fairhaven Parkway, Chuckanut Drive) - Alaska Marine Highway
		252.14	405.78	252	Samish Way – Western Washington University
		253.03	407.21	253	Lakeway Drive
		253.85	408.53	254	Iowa Street, Ohio Street, State Street
		254.88	410.19	255	SR 542 east (Sunset Drive) – Mt. Baker
		256.27	412.43	256	SR 539 north (Meridian Street) / Bellis Fair-Mall Parkway	Signed as exits 256A (SR 539) and 256B (Bellis Fair-Mall Parkway) northbound
		257.04	413.67	257	Northwest Avenue
		257.72	414.76	258	Bakerview Road – Bellingham International Airport
		260.19	418.74	260	Slater Road – Lummi Island
	Ferndale	262.63	422.66	262	Main Street – Ferndale City Center
		263.52	424.09	263	Portal Way
		266.04	428.15	266	SR 548 north (Grandview Road) – Custer
		270.30	435.01	270	Birch Bay, Lynden
	Blaine	274.23	441.33	274	Peace Portal Drive – Semiahmoo	Northbound exit and southbound entrance
		275.21	442.91	275	SR 543 north / H Street – Truck Customs	Northbound exit and southbound entrance (Pacific Border Crossing, continues north as 176th Street in Surrey BC)
		276.26	444.60	276	SR 548 south – Blaine City Center, Peace Arch State Park
		276.62	445.18	Canada–United States border Continues north as BC 99
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Concurrency terminus       HOV only       Incomplete access

Downtown Seattle express lanes

The entire highway is in Seattle, King County.

mi[76]	km	Destinations	Notes
165.29	266.01	I‑5 south	South end of express lanes
165.62	266.54	5th Avenue, Columbia Street	Southbound exit and northbound entrance (HOV only)
166.49	267.94	Pike Street (Metro Transit Tunnel)	Southbound exit and northbound entrance (HOV only)
166.63	268.16	Stewart Street – Seattle City Center	Southbound exit and northbound entrance
167.20– 167.26	269.08– 269.18	Mercer Street	Southbound exit and northbound entrance
168.96	271.91	Northeast 42nd Street – University of Washington	Northbound exit and southbound entrance
169.66	273.04	Ravenna Boulevard	Southbound entrance only (HOV only)
170.54	274.46	SR 522 (Lake City Way) – Bothell	Northbound exit and southbound entrance
172.07	276.92	Northeast 103rd Street, 1st Avenue Northeast	Northbound exit and southbound entrance
172.43	277.50	I‑5 north – Everett, Vancouver, BC	North end of express lanes
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

References

External links

Media related to Interstate 5 in Washington (state) at Wikimedia Commons

Route map: Bing / Google

Interstate 5
Previous state: Oregon	Washington	Next state: Terminus

Auxiliary routes of Interstate 5 California 105 1051 205 3055 405 505 605 805 9052 Oregon 105 205 3054 405 5054 Washington 205 405 6053 705 1Former 2Future 3Proposed 4Unbuilt 5Unsigned

State highways in Washington related to I‑5 SR 500 SR 501 SR 502 SR 503 Spur SR 504 Spur SR 505 SR 506 SR 507 SR 508 SR 509 SR 510 SR 512 SR 513 SR 515 SR 516 SR 518 SR 519 SR 520 SR 522 SR 523 SR 524 Edmonds Spur Lynnwood Spur SR 525 Spur SR 526 SR 527 SR 528 SR 529 Spur SR 530 SR 531 SR 532 SR 534 SR 536 SR 538 SR 539 SR 542 SR 543 SR 544 SR 546 SR 547 SR 548 SR 599 Former or proposed state routes: SR 514 SR 537 SR 540