Historic U.S. 60

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Until 1964, U.S. 60 generally followed what is today the current Interstate 10 corridor, connecting downtown Los Angeles with San Bernardino and the desert cities of Palm Springs, Indio, and Blythe. U.S. 60 entered Arizona at the Colorado River bridge east of Blythe and west of Quartzsite. The combination of Interstate 10 and California 60 freeways was built in stages through the 1960s, and signage for U.S. 60 was gone by 1972. A portion of old U.S. 60 is today part of the California 60 freeway between San Dimas and Beaumont; the California 60 freeway west of San Dimas was never signed as U.S. 60. The route was cosigned with U.S. 70 from Beaumont east to the Arizona state line near Blythe and with U.S. 99 from Beaumont east to Indio.