November 13, 1936 - Sundown, owned by champion horseman and California Highway patrolman Mark Freitas of Napa, California, claimed the title of “First Horse to Cross the San Francisco-Oakland Bay Bridge.” Sundown crossed for free but the car and trailer paid the toll of 65 cents. Once across the bridge, horse and owner took part in the parade celebrating the Bay Bridge’s opening. 

It is unknown if a horse has ever been ridden across the bridge. 

(Oakland Tribune Staff Archives)