This branch left the SP (now UP) Fresno line at Lodi, between Sacramento and Stockton. It headed generally east into the foothills of the Sierra Nevada mountains. Part of the line was initially constructed as the narrow gauge San Joaquin and Sierra Nevada; it was later converted to standard gauge by SP.

From west to east the stations served were Lodi, CCT (Central California Traction) Crossing, Victor, Lockeford, Clements, Wallace, Helisma, Valley Spring, Toyon, Hacinder, and Kentucky House.