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State Route 66 is a state highway in Southern California, running along a section of old U.S. Route 66 from La Verne east to San Bernardino, passing through Claremont, Upland, Rancho Cucamonga, Fontana and Rialto along Foothill Boulevard. In San Bernardino, it is the part of Fifth Street west of H Street (at the Interstate 215 interchange).
History U.S. Route 66 was assigned by the American Association of State Highway Officials in late 1926 and signed in 1928 by the Automobile Club of Southern California. At the time of the 1964 renumbering, US 66 used the following route (in today's terms): US 66 continued to be signed east of Pasadena until 1974, when it was removed, and the remaining separate section became State Route 66. San Bernardino to Arizona From San Bernardino to the Arizona state line, US 66 followed the old National Old Trails Highway. The old highway veers significantly away from I-15 between Victorville and Barstow passing through Oro Grande, Helendale, and Lenwood. Through Barstow, it is Main Street. A Marine Corps base is on top of the original highway and is unpassable. From Daggett, Historic 66 leaves I-40, crossing it three times before winding away through Bagdad, Amboy,and Essex. From Essex, the original alignment followed Goffs Road through Goffs and joining I-40 at the U.S. Route 95 exit. A later alignment is now I-40 from Goff. The original highway winds around I-40 in the Needles area, before crossing the Colorado River into Arizona. | |||||||||||||||||||||||||||||||
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