The Last California Route

Destination sign including California 905 on Interstate 5 in far southern San Diego County

On Interstate 5 southbound in San Diego County a few miles from the Mexican border, California 905 is the last state-designated route that intersects Interstate 5. Closer still to the Mexican border, Interstates 5 and 805 have an interchange. But that's still a few more exits away from Dairy Mart Road, the last destination on this sign.