Editing Interstate 605 (section)

{{short description|Interstate Highway in California}}
{{For|the cancelled interstate bypass in Seattle, Washington|Interstate 605 (Washington)}}
{{Use American English|date=April 2025}}
{{Use mdy dates|date=December 2022}}
{{Infobox road
|state=CA
|type=I
|route=605
|alternate_name=San Gabriel River Freeway
|section=619
|map={{maplink-road|from=Interstate 605.map}}
|map_custom=yes
|map_notes=I-605 highlighted in red
|length_mi=27.40
|length_round=2
|length_ref=<ref name="fhwa">{{cite web|url=https://www.fhwa.dot.gov/planning/national_highway_system/interstate_highway_system/routefinder/table02.cfm |title=Route Log and Finder List - Interstate System: Table 2|publisher=[[Federal Highway Administration|FHWA]]|access-date=October 7, 2007}}</ref>
|history=1940s as a state highway, 1964 as a number<ref>{{cite web |url=http://www.scvresources.com/highways/la_tidbits.htm |title=Los Angeles Highways |publisher=Scvresources.com |access-date=January 26, 2013 |url-status=dead |archive-url=https://web.archive.org/web/20111115132742/http://scvresources.com/highways/la_tidbits.htm |archive-date=November 15, 2011  }}</ref>
|spur_of=5
|spur_type=I
|direction_a=South
|terminus_a={{jct|state=CA|I|405|SR|22}} in [[Seal Beach]]
|junction={{plainlist
|*{{Jct|state=CA|SR|91}} in [[Cerritos, California|Cerritos]]
*{{jct|state=CA|I|105}} in [[Norwalk, California|Norwalk]]
*{{jct|state=CA|I|5}} in [[Santa Fe Springs, California|Santa Fe Springs]]
*{{Jct|state=CA|SR|72}} in [[Whittier, California|Whittier]]
*{{Jct|state=CA|SR|60}} in [[Avocado Heights, California|Avocado Heights]]
*{{jct|state=CA|I|10}} in [[Baldwin Park, California|Baldwin Park]]
*{{jct|state=CA|I|210}} in [[Irwindale, California|Irwindale]]
}}
|direction_b=North
|terminus_b=[[Huntington Drive]] in [[Duarte, California|Duarte]]
|counties=[[Orange County, California|Orange]], [[Los Angeles County, California|Los Angeles]]
|previous_type=I
|previous_route=580
|next_type=I
|next_route=680

}}
'''Interstate&nbsp;605''' (abbreviated '''I-605''', officially known as the '''San Gabriel River Freeway''' and locally referred to as '''The 605''') is a {{convert|27|mi|km|adj=mid|-long}} major north–south [[List of auxiliary Interstate Highways|auxiliary Interstate Highway]] in the [[Greater Los Angeles]] urban area of [[Southern California]]. It runs from [[Interstate 405 (California)|I-405]] and [[California State Route 22|State Route&nbsp;22]] (SR&nbsp;22) in [[Seal Beach, California|Seal Beach]] in [[Orange County, California|Orange County]] to [[Interstate 210 (California)|I-210]] just south of the [[Irwindale, California|Irwindale]]–[[Duarte, California|Duarte]] border in [[Los Angeles County, California|Los Angeles County]]. The San Gabriel River Freeway closely parallels the [[San Gabriel River (California)|San Gabriel River]] for most of its alignment, hence its name, which is one of the few [[Southern California freeways]] not named after a city along its route.

Aside from changes to the interchange with I-105 (which did not open until the early 1990s), and the addition of an HOV lane between I-405 and I-10, I-605 is one of the only remaining freeways that kept its original alignment throughout its run through Los Angeles County since it first opened.