Grandstand and portion of track at Ascot Park, a racetrack built near the center of Los Angeles that offered racing from 1903-1907. It was closed due to a city ordinance forbidding gambling. Baldwin's track, Santa Anita Park, which opened in December 1907 was designed and built by the same architect that built Ascot Park: A.M. Allen. The two tracks are similar in style and are occasionally mistaken for each other. In this photo the stands are full and there are eight horses with jockeys on the track.

https://arcadiahistory.andornot.com/en/permalink/photographs551