Gregory Duncan "Don" Cameron (c. 1894 – July 11, 1952) was an American Thoroughbred horse trainer who trained Count Fleet, who won the U.S.
A native of California, Don Cameron served as an aviator in the United States Military during World War I.
Working in the Thoroughbred horse racing industry, he trained for various owners including the prominent stables of Vera S. Bragg and J. Shirley Riley.
[1] Beginning in September 1940 Don Cameron trained Challedon for owner William L. Brann and won the Pimlico Special and Havre de Grace Handicap.
Cameron would see his colt voted the 1943 American Horse of the Year, the most prestigious honor for Thoroughbred runners in the United States.