California State Route 57 is the Orange Freeway, a major north-south freeway located entirely within Southern California. This freeway serves the cities and communities of the Greater Los Angeles Metropolitan area.

This freeway's north terminus is at its junction with the Foothill Freeway, I-210, in Glendora. The freeway continues south to the interchange with the San Bernardino Freeway, Interstate 10 and Chino Valley Freeway, SR 71 , in south San Dimas. It continues south into the Pomona Valley, where it merges and shares an alignment with the Pomona Freeway, SR 60, in Diamond Bar, California for several miles before separating and heading south. The freeway passes through the Brea Hills into Orange County. From the county line, its alignment is straight south to its terminus at its junction with the Santa Ana Freeway, Interstate 5, and the Garden Grove Freeway, SR 22, in southwestern Orange. This junction is also referred locally as the "Orange Crush interchange" for its infamous traffic congestion.

Cities/Communities along CA/SR-57 (north to south)

• San Dimas
• Pomona
• Diamond Bar
• City of Industry
• Brea
• Fullerton
• Placentia
• Anaheim
• Orange

Major roads intersecting CA/SR-57 (north to south)

• Foothill Freeway - I-210 in San Dimas

at 34° 07' 12"N, 117° 49' 27"W

• Chino Valley Freeway - SR 71 at the Kellogg interchange complex in San Dimas

at 34° 04' 06"N, 117° 48' 27"W

• San Bernardino Freeway - I-10 at the Kellogg interchange complex in southwest San Dimas

at 34° 03' 55"N, 117° 48' 23"W

• Pomona Freeway - SR 60 in Diamond Bar

at 34° 01' 20"N, 117° 48' 49"W and 34° 00' 06"N, 117° 50' 11"W

• Riverside Freeway - SR 91 in Anaheim

at 33° 50' 59"N, 117° 52' 33"W

• Santa Ana Freeway - I-5 at the Orange Crush interchange complex in Orange

at 33° 46' 53"N, 117° 52' 45"W

• Garden Grove Freeway - SR 22 at the Orange Crush interchange complex in Orange

at 33° 46' 44"N, 117° 52' 35"W