In the days of the Red Car in Altadena (1902–1941), Lake Avenue was known as the short line, or Oak Knoll line. Oak Knoll is the street into which Lake Avenue transitions with a slow curve to the right and then back to the left. The Pacific Electric cars came up from a switch on the Huntington Drive line below the famous hotel of the same name. The “short line” was a shorter way to get to Lake and Mariposa in Altadena without having to ride the circuitous route up Fair Oaks Avenue.