Interstate 605

For the planned interstate bypass in Seattle, Washington, see Interstate 605 (Washington).

Interstate 605 marker

Interstate 605
San Gabriel River Freeway
Route information
Defined by Streets and Highways Code § 619
Maintained by Caltrans
Length: 27.40 mi[1] (44.10 km)
History: 1940s as a state highway, 1964 as a number[2]
Major junctions
South end: SR 22 / I-405 in Seal Beach

SR 91 in Cerritos
I-105 in Norwalk
I-5 in Santa Fe Springs
SR 72 in Whittier
SR 60 in Avocado Heights

I-10 in Baldwin Park
North end: I-210 / Huntington Dr. in Irwindale
Highway system

Interstate 605 (abbreviated I-605, officially known as the San Gabriel River Freeway and colloquially referred to as the 605 (the six-oh-five)) is a major north–south Interstate Highway in the Greater Los Angeles Area of Southern California. It is about 27 miles (43 km) in length, and runs from Seal Beach to Irwindale, closely paralleling the San Gabriel River for most of its alignment. The San Gabriel River Freeway is one of the few Southern California freeways not named after a city along its route.

This route is part of the California Freeway and Expressway System.[3]

Route description

The California Streets and Highways Code defines Route 605 as "(a) Route 1 near Seal Beach to Route 405. (b) Route 405 to Route 210 near Duarte." However, the portion in subsection A has yet to be constructed.

The southern terminus of I-605 is at the San Diego (I-405) and Garden Grove (State Route 22) Freeways in Seal Beach. From there, it runs roughly north through the Gateway Cities of the Los Angeles Basin. It then shifts north-northeast, crossing the Whittier Narrows and across the San Gabriel Valley. I-605 then ends at its junction with the Foothill Freeway, (I-210) in Duarte, a small city located at the foothills of the San Gabriel Mountains.

I-605 follows most of the length of the San Gabriel River from the San Diego Freeway in Seal Beach to the Santa Fe Dam. Typically dry riverbed and flood basins are visible from many portions of the route, especially near the northern terminus. Also, the freeway features an HOV lane for carpools of two or more people throughout most of the route. The left shoulder is close to non-existent. The road also suffers from traffic jams regularly, especially near I-5 (the Santa Ana Freeway).

Signs along I-605's entrances and freeway junctions do not include destinations (control cities) such as "Seal Beach" or "Irwindale", but simply read "NORTH" or "SOUTH". In place of control cities, a simple "THRU TRAFFIC" designation is used on signs along I-605 itself.

Route 605 from Route 405 to Route 10 is known as the San Gabriel River Freeway, as named by Senate Bill 99, Chapter 1101 in 1967.[4]

Other names


Metro Express line 577 runs through Interstate 605 between Interstate 10 and Interstate 405. The Green Line serves the Norwalk Station at the interchange of the eastern terminus of Interstate 105. Foothill Transit Commuter Express Lines 493, 495, and 497 use Interstate 605 from the Interstate 10 interchange to continue their routes to the Pomona Freeway to destinations in City of Industry, Diamond Bar, and Chino.


Approaching the northern terminus of I-605

In 1957, the number for this route was proposed as I-13, as it is positioned approximately midway between I-5 and I-15 (although it intersects the former). That number was rejected, as was the second proposed number, I-102. Finally, the designation I-605 was accepted in 1958.[6]

Interstate 605 began construction in 1963 and the first section was opened in 1964 from Interstate 405 to Pomona Freeway CA 60. The newest section (extension to Interstate 210) was opened in 1971 was originally signed as SR 243. There are plans to extend it to SR 1 further south in Orange County, but strong community opposition means that it is unlikely that the alignment will ever be built.[6]

Exit list

OrangeSeal Beach0.000.001A SR 22 west (7th Street) Long BeachSouth end of I-605; SR 22 exit 2
0.410.661B I-405 south (San Diego Freeway) / SR 22 east (Garden Grove Freeway) San Diego, Garden GroveFormer SR 7 south; I-405 north/SR 22 west exit 24
0.410.661C I-405 north (San Diego Freeway) Santa MonicaSigned as exit 1A northbound; former SR 7 north; I-405 south exit 24A
Los Alamitos1.412.271DKatella AvenueLos AlamitosSigned as exit 1B northbound
1.692.722AWillow StreetSigned as exit 1B northbound
Los AngelesLong Beach1.933.112BSpring Street, Cerritos AvenueSouthbound exit and northbound entrance
3.385.443Carson Street, Lincoln Avenue – Hawaiian GardensFormer US 91 and SR 18
Cerritos4.517.265ADel Amo BoulevardLakewood
5.398.675BSouth Street
6.6910.777A SR 91 (Artesia Freeway)
Norwalk7.4511.997BAlondra Boulevard
8.5013.689ARosecrans Avenue
9.2914.959B I-105 west (Century Freeway)I-105 east exits 18A-B
9.2914.959CImperial HighwaySigned as exit 9B southbound
9.5315.3410Firestone BoulevardFormer SR 42
Santa Fe Springs11.2518.1111Florence AvenueDowney
11.2518.1111 I-5 (Santa Ana Freeway) Los Angeles, Santa AnaFormer US 101 Bypass south; I-5 exit 124
11.8919.1412Telegraph Road – Santa Fe SpringsFormer US 101 Bypass north, Former SR 26
13.1821.2113Slauson Avenue
13.6922.0314Washington BoulevardPico RiveraSigned as exits 14A (west) and 14B (east) southbound
Whittier15.2124.4815 SR 72 (Whittier Boulevard) WhittierFormer US 101
Pico Rivera16.0525.8316Beverly BoulevardSouthbound exit to Beverly Boulevard west is via exit 17
17.2127.7017Rose Hills Road
Industry18.2929.4318Peck Road
19.0530.6619 SR 60 (Pomona Freeway) Los Angeles, PomonaSR 60 exit 12
21.0333.8421Valley BoulevardIndustryFormer US 60 / SR 212
Baldwin Park21.8335.1322 I-10 (San Bernardino Freeway) Los Angeles, San BernardinoFormer US 99 / US 70 / US 60; I-10 east exits 31A-B, south exit 31A
22.7136.5523Ramona BoulevardBaldwin Park, El MonteFormer US 99
Irwindale23.7938.2924Lower Azusa Road, Los Angeles Street
25.1640.4925Live Oak Avenue – IrwindaleNorthbound exit and southbound entrance
26.6042.8126Arrow HighwaySouthbound exit and northbound entrance
27.4044.1027 I-210 (Foothill Freeway) Pasadena, San BernardinoSigned as exits 27A (east) and 27B (west); no exit number southbound; I-210 east exit 36A, west exit 36B
Duarte27.5444.3227CHuntington DriveDuarteAt-grade intersection; former US 66; north end of I-605
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

See also


  1. "Route Log and Finder List - Interstate System: Table 2". FHWA. Retrieved October 7, 2007.
  2. "Los Angeles Highways". Retrieved January 26, 2013.
  3. "CA Codes (shc:250-257)". Retrieved January 26, 2013.
  4. 2007 Named Freeways, Highways, Structures and Other Appurtenances in California (PDF). Caltrans. p. 62. Retrieved March 28, 2007.
  5. Ibid. 97, 185
  6. 1 2 Faigin, Daniel. "Interstate 605". California Highways. Retrieved September 23, 2016.
  7. 1 2 Warring, KS (April 18, 2008 by). "Interstate 605 Freeway Interchanges" (PDF). California Numbered Exit Uniform System. California Department of Transportation. Retrieved September 1, 2014. Check date values in: |date= (help)
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