Foothill Boulevard (Southern California)

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Foothill Boulevard is a major road in the city and county of Los Angeles, as well as an arterial road in San Bernardino County, stretching well over 50 miles (80 kilometers) in length, with some notable breaks along the route. Like its name implies, Foothill Boulevard runs across the foothills of the San Gabriel and San Bernardino Mountains. Foothill Boulevard starts off in Newhall Pass in the Sylmar district of Los Angeles at Sierra Highway near the southern terminus of the Antelope Valley Freeway (CA-14). Foothill Blvd. is a two-lane road through Newhall Pass, paralleling the Interstate 5 truck lanes until its intersection with Balboa Boulevard, where it becomes a four-lane road for the remainder of its length. At the I-5/I-210 interchange, Foothill Boulevard heads southeast along the Foothill Freeway, bypassing the city of San Fernando, entering Lake View Terrace south of the I-210/CA-118 interchange. CA-118 formerly ran along Foothill Boulevard from the 210/118 intersection until Pasadena. In 1974, the current alignment of Interstate 210 was completed, and the only remaining portion of the Foothill Boulevard Freeway was the unsigned freeway over the Arroyo Seco in Pasadena.

Foothill Boulevard leaves the San Fernando Valley, passing through the Sunland and Tujunga neighborhoods in the northwestern Crescenta Valley. It enters the unincorporated area of La Crescenta-Montrose (known just as "La Crescenta" to locals) at Lowell Avenue, and it serves as the main street thorough the valley. Upon crossing the Verdugo Wash, it enters the city of La Cañada Flintridge and the northern terminus of the Glendale Freeway. Further east is the southern terminus of the Angeles Crest Highway (CA-2). Note that although the Glendale Freeway and Angeles Crest Hwy both end at Foothill Boulevard, Foothill itself does not intersect State Route 2, as CA-2's aligment heads east one mile on Interstate 210. The western segment of Foothill Boulevard ends at Oak Grove Avenue in Pasadena, where it heads southeast across the unsigned freeway alignment, with an interchange at Yucca Lane. To reach the second portion of Foothill Boulevard, head east on Oak Grove, where it becomes Woodbury Road, head south on Fair Oaks Avenue, and head east on Walnut Street, passing through Old Town Pasadena, where at Greenwood Avenue, it turns back into Foothill Boulevard.

Foothill Blvd. remains parallel to Interstate 210 until entering the Arcadia city limits, where it heads due east and the freeway heads southeast. This section of Foothill Boulevard ends at Mountain Avenue in Monrovia. The third section of Foothill Boulevard is accessed by going south on Mountain and going east on Huntington Drive through the Los Angeles County cities of Monrovia, Duarte, and Bradbury. Upon crossing the San Gabriel River, Huntington turns into Foothill Boulevard in Irwindale. Foothill passes through the city of Azusa, where it ends at Citrus Avenue. The easternmost portion of Foothill Boulevard can be accessed by heading southeast on Alosta Avenue (old U.S. Highway 66) in Azusa (the city of Glendora renamed Alosta Avenue "Route 66"), and at Amelia Avenue, it turns back into Foothill Boulevard. At the intersection of CA-210 near the San Dimas/La Verne city limits, Foothill Boulevard is defined as California State Route 66, although it is unsigned in Los Angeles County.
Foothill Blvd (CA-66) passes through Claremont before entering San Bernardino County in the city of Upland. Foothill passes through residential areas before emerging in Rancho Cucamonga, where it intersects Interstate 15. Foothill Boulevard continues east through the cities of Fontana, Rialto, and San Bernardino. Foothill Boulevard ends at the San Bernardino city limits, where it retains its CA-66 signage, but changes into 5th Street. At the intersection with Interstate 215, the CA-66 designation ends, although old US-66 headed north on Mount Vernon Avenue (along old US-395/US-91) before exiting the Inland Empire over the Cajon Pass. Fifth Street has an interchange with CA-30 (future Interstate 210) in Highland before turning into Greenspot Road, where it ends in the San Bernardino Mountains.

There are US-66 signs within the cities of Rancho Cucamonga, Rialto, and San Bernardino.

Foothill Boulevard (Southern California)

Communities served

See also