San Pablo Avenue is ever-changing
By Steve Price San Pablo Avenue is presently designated as California State Route 123. It originated during the Spanish colonial era and was then called Camino de la Contra Costa. In the American era it became Contra Costa Road and then San Pablo Avenue. In 1927 it became part of the Lincoln Highway, America's first transcontinental highway. A streetcar line ran on it between Oakland and Richmond. El Cerrito was largely rural at the time, but eventually the Eastshore Freeway (I-80) assumed the role of major north/south travel and San Pablo Avenue became increasingly urbanized — less an interurban highway and more an urban avenue. The designation of State Route 123 for San Pablo Avenue does not go the full length of the Avenue, only a little over 7 miles out of a total of over 22 miles. State Route 123 goes from I-580 in Oakland to Cutting Boulevard at Del Norte, where it makes a dogleg over to the I-80 northbound on-ramp. Why so short? That’s because this stretch is close to and pa...