It became a streamliner in 1941 and was discontinued on April 8 , 1968 .
The Lark was an overnight passenger train of the Southern Pacific Company on the 470 - mile run between San Francisco and Los Angeles .
Lark became a streamliner in 1941 and was discontinued on April 8 , 1968 .
The Lark was an overnight passenger train of the Southern Pacific Company on the 470 - mile run between San Francisco and Los Angeles .