Ontario and San Antonio Heights Railroad Company

[4] The Ontario Electric Company was merged into the Pacific Light & Power Corporation in 1908, and the extension to Pomona commenced work in 1909, which opened New Year's Day 1911.

Adams in San Antonio Heights after the inauguration of the electric tram had made them obsolete.

When hitched to a harrow for ranch work, they persistently refused to budge and coaxing and force were equally without effect.

[7] The railroad operated along Euclid Avenue, connecting the Ontario Southern Pacific station in the south to the Upland Santa Fe station, Euclid Avenue stop of the Pacific Electric Upland–San Bernardino Line, and continuing north to San Antonio Heights.

The Upland–San Antonio Heights segment was an independent streetcar service until about July 1924 when system-wide power issues forced bus substitution that was never reversed.