Prove Out to the eventual 1973 Horse of the Year. Prove Out also defeated Secretariat's stablemate, the 1972 Kentucky Derby winner and 1973 U.S. Champion Older Horse Riva Ridge, in the 1973 Jockey Club Gold Cup. In addition to his two memorable victories in 1973, Prove Out also ran track record times at Saratoga for 7 furlongs (1:21), and at Belmont Park for 1 miles (1:40). His Woodward Stakes time of 2:25 for 1 miles on an off track is the second fastest performance ever recorded for that distance at Belmont Park, behind only Secretariat's 2:24 record Belmont Stakes win. Prove Out's
Kentucky Derby Challenge Stakes Kentucky Derby Challenge Stakes The Kentucky Derby Challenge Stakes was an English Thoroughbred horse race intended to become an annual race, but was run only one time on 18 March 2009 at Kempton Park Racecourse in Sunbury-on-Thames, Surrey. Open to three-year-old European horses, it was raced clockwise at a distance of nine furlongs ( miles, app. 1800 metres) on Polytrack. The winner of the race was guaranteed one of the twenty starting spots in the mile (10 furlongs) 2009 Kentucky Derby held on the first Saturday in May on the dirt track at Churchill Downs in Louisville, Kentucky. The race