State Route 57 (California)
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| Orange Freeway | ||||
State Route 57 highlighted in red; unconstructed portion in purple
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| Route information | ||||
| Defined by | ||||
| Maintained by Caltrans | ||||
| Length: | 25.84 mi (41.59 km) | |||
| History: | State highway in 1931; numbered in 1964 | |||
| Major junctions | ||||
| South end: |
  I-5 / SR 22 in Santa Ana
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| North end: |
  I-210 / SR 210 in Glendora
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| Location | ||||
| Counties: | Orange, Los Angeles | |||
| Highway system | ||||
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State Route 57 (SR 57), also known as the Orange Freeway for most of its length, is a north–south state highway in the Greater Los Angeles Area of California. It connects the interchange of Interstate 5 (I-5) and SR 22 near downtown Orange, locally known as the Orange Crush, to the Glendora Curve interchange with I-210 and SR 210 in Glendora. The highway provides a route across several spurs of the Peninsular Ranges, linking the Los Angeles Basin with the Pomona Valley and San Gabriel Valley.
A predecessor to this road ran through Brea Canyon by the early 20th century and was added to the state highway system. The freeway was built in stages during the 1950s, one of which included the Brea Canyon Freeway; SR 57 was designated as part of the 1964 state highway renumbering. The final portion of the present-day Orange Freeway was not completed until the mid 1970s. The latest piece of SR 57 to be added was formerly part of I-210, after SR 210 was legislatively extended to San Bernardino in 1998. An unconstructed extension from Santa Ana south to Huntington Beach remains in the legal definition of SR 57, and has been studied as a toll road above the Santa Ana River.
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