Route Map of the <a href="https://en.wikipedia.org/wiki/California_Southern_Railroad" class="extiw" title="w:California Southern Railroad">California Southern Railroad</a> — <a href="//commons.wikimedia.org/wiki/Category:Southern_California" title="Category:Southern California">Southern California</a>.
Sean Lamb (<a href="//commons.wikimedia.org/wiki/User:Slambo" title="User:Slambo">User:Slambo</a>)
Original state outlines, water features and colors cropped from the public domain map: <a href="//commons.wikimedia.org/wiki/File:US_state_outline_map.png" title="File:US state outline map.png">Image:US state outline map.png</a>; names, city dots and route line added by Sean Lamb (<a href="//commons.wikimedia.org/wiki/User:Slambo" title="User:Slambo">User:Slambo</a>) using tools available in the GIMP