Constructed by the San Bernardino Valley Traction Company starting in 1902, the line began regular service on March 10, 1903.

[1] Cars initially operated into San Bernardino under trackage rights via the Redlands Street Railway until the two merged in June after opening.

[4] On November 1, 1920, through service was provided to Los Angeles for the first time, with Redlands cars appended to Upland–San Bernardino Line trains.

[5] Between April and June 1928 through-routing was discontinued with the San Bernardino–Riverside Line as part of a scheme developed by the California Railroad Commission;[6] this was reverted after proving unsuccessful.

Service ended after July 19, 1936,[7] leaving Redlands as the largest city in the Pacific Electric system served exclusively by buses.