The Whittier Line followed the
Long Beach Line from Los Angeles south to
Slauson Junction (south of Slauson Boulevard) where it branched off in an easterly direction to Whittier and Yorba Linda. From there, the double track Whittier Line ran easterly, in private way between dual roadways of Randolph Street, through Huntington Park, Vernon, Bell, and Maywood to reach the
Los Angeles River. Crossing the river, the double track in private way followed intermittent sections of Randolph Street through Bell Gardens and Commerce, and crossed the
Rio Hondo south of Slauson Avenue. The line continued easterly, south and parallel to, Slauson Avenue. Across the Pico Rivera area and the San Gabriel River into Los Nietos, where the line crossed the
Atchison, Topeka and Santa Fe Railway Third District main line (Los Nietos) at Norwalk Boulevard then turned northerly towards Whittier. The single track
La Habra–Fullerton–Yorba Linda Line branched easterly in private way off the Whittier Line east of Norwalk Boulevard. The line in private way followed Allport Avenue and Lynalan Avenue then turned easterly crossing Whittier Boulevard into Philadelphia Street to the PE station at Comstock Avenue. ==Stations==