The Inter-California Railway's northern terminus was in Niland, California, where the line connected to the Sunset line of Southern Pacific Railroads.[3] The Inter-Cal then continued down through the Imperial Valley until Calexico, California, just north of the United States-Mexico border.[3][4] From Calexico, the Inter-Cal crossed the border into Mexicali, Baja California and then continued through the Mexicali Valley, before crossing the border again at Los Algodones, Baja California and finally terminating at Araz Junction in Andrade, California, where the line reconnected to the Sunset line.[3]