New England Futurity (1938)
Pimlico Futurity (1938)
Maryland Futurity (1938
Arlington Classic (1939)
Hawthorne Gold Cup Handicap (1939)
Havre de Grace Handicap (1939, 1940)
Narragansett Special (1939)
Pimlico Special (1939, 1940)
Yankee Handicap (1939)
Hollywood Gold Cup (1940)
Whitney Stakes (1940)
Philadelphia Handicap (1942)
Challedon (1936–1958) was an American Hall of Fame Champion Thoroughbred racehorse. Bred in Maryland by William L. Brann and Robert S. Castle, he raced under the colors of their Branncastle Farm.
Racing at age two, Challedon won four of his six but was outshone by another colt named El Chico, who was voted that year's U.S. Champion 2-Yr-Old Colt. At age three, under jockey George Seabo, Challedon finished second in the 1939 Kentucky Derby, eight lengths behind future Hall of Fame colt Johnstown. Then, in the Preakness Stakes, Challedon won by a length and a half with the heavily favored Johnstown finishing off the board. For trainer Louis J. Schaefer, Challedon's win meant he became the first person to have both ridden and trained a Preakness Stakes winner. His feat would only be matched 30 years later by Johnny Longden. Challedon wasn't eligible to compete in the final leg of the U.S. Triple Crown and as such Johnstown had an easy time in winning the Belmont Stakes. However, Challedon's wins in eight other important races that year, including a world record performance in the Tranter Purse raced at Keeneland Race Course, earned him the U.S. Champion 3-Yr-Old Colt honors. In a poll conducted by the Turf and Sport Digest, Challedon was voted Horse of the Year, taking 156 of the possible 208 votes ahead of the two-year-old Bimelech, who received 36.