Showing here is a portion of the schedule for the San Joaquin Daylight for the segment during which it traversed the so-called “Mococo Line” (from MOuntain COpper COmpany) from Martinez to Tracy and back again, excerpted from the Southern Pacific’s official Timetable #10, issued on May 12, 1968.
Following the SP’s practice of designating “east” and “west” on its timetables based on the location of its Market Street corporate headquarters in San Francisco, the “eastward” San Joaquin Daylight (Train 52, originating in Oakland) is actually heading south to Los Angeles, while the “westward” return trip (Train 51, originating in L.A.) is heading north to Oakland.
On its way from Oakland at this time, Train 52’s route skirted the Bayshore up to Martinez each morning. It would then depart from the station in Martinez at 8:58 AM, taking about 48 minutes to travel the 48 rail miles to the Tracy depot via the Mococo.
From Tracy, the train headed over to Lathrop then went south to Los Angeles, essentially paralleling Highway 99 for most of its journey through the Central Valley.
Per the 1968 schedule, the San Joaquin Daylight’s northbound return trip as Train 51 from L.A. arrived back in downtown Tracy at 3:20 PM each day on its way back to Oakland.
Originally a gleaming steam-powered streamliner, by 1968 the San Joaquin Daylight was pared down to a handful of coach cars led by a single diesel locomotive. The train was discontinued on April 30, 1971.
ABOVE: Riding from Fresno to San Francisco or Los Angeles in the early 1940s? There’s no better (or more affordable) way to go than a seat aboard the recently-launched streamlined San Joaquin Daylight. (Southern Pacific Archives)