Prior to August 1965 there were lines operated by the Southern Pacific and the Pacific Electric, which the SP controlled from 1911. The Pacific Electric was merged into the SP in 1965 and all the track of the railroads were operated as the SP.
The Santa Fe served town and station that were served by the SP or PE in many citrus producing places east of Los Angeles. In some area they might be indifferent parts of the town or next to each other, in some case they served the same packing house.
Here are some places served by the Santa Fe and SP: Santa Ana, Anaheim, Tustin, Pomona, Riverside, Highgrove, Redlands.
Santa Fe and PE: Orange, Fullerton, Sunny Hills, San Dimas, Lamanda Park, Azusa, Glendora, La Verne, Claremont, Upland, Rialto, Corona, Redlands and Highland.
Perhaps some more?
Locations where two RR served a packing house: Orange, Sunny Hills, San Dimas, Glendora, Claremont, Upland, Corona, Riverside, Redlands, Rialto and Highland.
cliff prather