when did secretariat win the kentucky derby

Secretariat won the Kentucky Derby on May 5, 1973. He set a record time of 1:59 2/5 and won by 2 1/2 lengths ahead of Sham. The race was the 99th running of the Kentucky Derby at Churchill Downs in Louisville, Kentucky, and was viewed by a record crowd of 134,476 people. Secretariat's victory in the Derby was the beginning of his historic Triple Crown run that year.