Editing Interstate 5 (section)

===Washington===
{{main|Interstate 5 in Washington}}

The highway enters [[Vancouver, Washington|Vancouver]] at the north end of the Interstate Bridge and immediately intersects [[Washington State Route 14]] near the [[Fort Vancouver National Historic Site]]. The freeway passes near downtown Vancouver and continues north through the city's suburbs before being rejoined by I-205 at [[Salmon Creek, Washington|Salmon Creek]]. I-5 travels north along the Columbia River to [[Kelso, Washington|Kelso]] and [[Longview, Washington|Longview]], where it switches to following the [[Cowlitz River]] between the [[Willapa Hills]] and Cascade foothills. The freeway then turns northwest to traverse a [[prairie]] and the adjacent cities of [[Chehalis, Washington|Chehalis]] and [[Centralia, Washington|Centralia]] while concurrent with [[U.S. Route 12|US&nbsp;12]].<ref name="google"/><ref name="WSDOT-Map">{{cite WSDOT map |year=2014 |accessdate=December 17, 2021}}</ref>

I-5 continues north to a junction with [[U.S. Route 101|US&nbsp;101]] in [[Tumwater, Washington|Tumwater]], near [[Olympia, Washington|Olympia]] and the [[Washington State Capitol|state capitol campus]]. The freeway skirts the southeast side of downtown Olympia and turns east to cross [[Joint Base Lewis–McChord]] (formerly [[Fort Lewis (Washington)|Fort Lewis]] and [[McChord Field|McChord Air Force Base]]). I-5 then turns north to enter [[Tacoma, Washington|Tacoma]] but bends east to intersect [[Interstate 705|I-705]], a short spur into [[downtown Tacoma]]. The freeway turns north again after leaving Tacoma and its [[Port of Tacoma|nearby seaport]] near [[Fife, Washington|Fife]] to traverse the suburbs of [[King County, Washington|South King County]]. I-5 intersects its eastern bypass of [[Seattle]], [[Interstate 405 (Washington)|I-405]], in [[Tukwila, Washington|Tukwila]] near [[Seattle–Tacoma International Airport]].<ref name="WSDOT-Map"/>

The freeway generally follows the [[Green River (Duwamish River tributary)|Green]] and [[Duwamish River|Duwamish]] rivers into Seattle, passing [[Boeing Field]] and the [[Industrial District, Seattle|industrial district]] in the process. I-5 intersects [[Interstate 90|I-90]] near Seattle's [[Chinatown–International District, Seattle|Chinatown–International District]] on the south side of [[downtown Seattle]]. The freeway turns northwest and bisects downtown Seattle in a trench, with some sections covered by [[Freeway Park]] and the [[Washington State Convention Center]].<ref>{{cite news |last=Dorpat |first=Paul |author-link=Paul Dorpat |date=May 5, 2012 |title=Clearing the path for Seattle's I-5 ditch, 1961 |url=https://www.seattletimes.com/pacific-nw-magazine/clearing-the-path-for-seattle-s-i-5-ditch-1961/ |work=The Seattle Times |accessdate=December 17, 2021 |archive-date=December 17, 2021 |archive-url=https://web.archive.org/web/20211217084258/https://www.seattletimes.com/pacific-nw-magazine/clearing-the-path-for-seattle-s-i-5-ditch-1961/ |url-status=live }}</ref> It then turns north to intersect [[Washington State Route 520]] near [[Eastlake, Seattle|Eastlake]] and crosses the [[Ship Canal Bridge]] over [[Portage Bay]], which lies between [[Lake Union]] and [[Lake Washington]]. I-5 continues through northern Seattle, passing the [[University District, Seattle|University District]] near the [[University of Washington]] campus and [[Green Lake (Seattle)|Green Lake]] before leaving the city.<ref name="WSDOT-Map"/> The section between downtown Seattle and [[Northgate, Seattle|Northgate]] includes a set of [[reversible lane|reversible express lanes]] that add extra capacity in the peak direction of travel.<ref>{{cite news |last=Giordano |first=Lizz |date=July 22, 2019 |title=A driver can dream: Can I-5 express lanes be more nimble? |url=https://www.heraldnet.com/news/a-driver-can-dream-can-i-5-express-lanes-be-more-nimble/ |work=[[The Everett Herald]] |accessdate=December 17, 2021 |archive-date=November 28, 2021 |archive-url=https://web.archive.org/web/20211128103107/https://www.heraldnet.com/news/a-driver-can-dream-can-i-5-express-lanes-be-more-nimble/ |url-status=live }}</ref>

I-5 continues through the northern suburbs of Seattle and turns northeasterly in [[Lynnwood, Washington|Lynnwood]], where it is rejoined by I-405, which serves the [[Eastside (King County, Washington)|Eastside]] region. The freeway travels north through [[Everett, Washington|Everett]], skirting the city's downtown and intersecting [[U.S. Route 2|US&nbsp;2]], and leaves the [[Seattle metropolitan area]] for the rural [[Skagit Valley]]. I-5 descends into the valley and travels through [[Mount Vernon, Washington|Mount Vernon]] and [[Burlington, Washington|Burlington]] before climbing into the [[Chuckanut Mountains]], where it turns west towards [[Bellingham Bay]] (part of the [[Salish Sea]]). The freeway travels around downtown [[Bellingham, Washington|Bellingham]] and turns northwest to continue across the rural [[Fraser Lowland]]. I-5 terminates at the [[Peace Arch Border Crossing]] on the [[Canada–United States border|Canadian border]], adjacent to the [[Peace Arch|eponymous monument]], in [[Blaine, Washington|Blaine]]. The highway becomes [[British Columbia Highway 99]], which continues northwest to [[Vancouver]].<ref name="WSDOT-Map"/>