Brooklyn Handicap
After the 1917 racing season, Regret was retired for breeding to the new Whitney farm in Lexington, Kentucky. In this last season, she raced in the Brooklyn Handicap against the best of her generation: Old Rosebud, Roamer, Omar Khayyam (winner of the 1917 Kentucky Derby), Boots, Ormsdale and Chiclet. In the final strides, she was defeated by a nose by her stablemate, Borrow, giving away 5 pounds.