[2] At age three, Cleopatra strung together six stakes wins and finished in the money in 13 of 15 starts.
In April, she finished second in the Ladies Handicap to inaugural Pimlico Oaks winner Milkmaid at Aqueduct Racetrack.
[3][4] In July, Cleopatra won the Coaching Club American Oaks, setting a new track record at Belmont Park for the 11-furlong race in 2:18.80.
In the late autumn, Cleopatra came back to win the Latonia Championship Stakes (in what is now Turfway Park), setting a new track record for the marathon 1 3/4 mile race in 2:56.80.
She was retrospectively named American Champion Three-Year-Old Filly for 1920 by The Blood-Horse magazine.