The line reached its highest ridership the year it opened but never recovered at a time when the Inland Empire was far less populated and a commute of that distance was rare.

[4] Initially only local service was provided, and passengers from Los Angeles continuing to Riverside were encouraged to take the longer trip and change at San Bernardino.

[5] On March 15, 1915, most local service was replaced with through trips to the Pacific Electric Building in Downtown Los Angeles.

[5] All trips became through-routed to Los Angeles on November 2, 1931 as service to the cement plant was discontinued.

Service was reduced to a single trip between Riverside and Rialto by June 9, 1940 and discontinued outright on November 18.