My dad's best friend, Elmer, sent me this photo. Elmer worked for the Southern Pacific Railroad for 42 years. He retired as the Yardmaster of the SP Bayshore Yard in San Francisco. The date of this photo is July 21, 1956. This is in the town of San Bruno which is about a 15 minute drive south of San Francisco on US 101. It shows SP engine #4300, with Train #143, west. SP locomotive #2345 is on excursion and is traveling east.
Matt