Interstate 605
Interstate 605 (abbreviated I-605, officially known as the San Gabriel River Freeway) is a 27-mile-long (43 km) major north–south auxiliary Interstate Highway in the Greater Los Angeles urban area of Southern California. It runs from I-405 and State Route 22 (SR 22) in Seal Beach to I-210 in Duarte. The San Gabriel River Freeway closely parallels the 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.
Interstate 605 | ||||
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| San Gabriel River Freeway | ||||
I-605 highlighted in red | ||||
| Route information | ||||
| Auxiliary route of I-5 | ||||
| Maintained by Caltrans | ||||
| Length | 27.40 mi (44.10 km) | |||
| History | 1940s as a state highway, 1964 as a number | |||
| NHS | Entire route | |||
| Major junctions | ||||
| South end | I-405 / SR 22 in Seal Beach | |||
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| North end | I-210 / Huntington Dr. in Duarte | |||
| Location | ||||
| Country | United States | |||
| State | California | |||
| Counties | Orange, Los Angeles | |||
| Highway system | ||||
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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.