If it's the first Saturday in May, it has to be the running of the Kentucky Derby. And to make it even more exciting this year, the classic horse race falls on May 5 - the day of celebration known as Cinco de Mayo. The 138th running of the "greatest two minutes in sports" takes place at Churchill Downs in Louisville, Kentucky, and is the first leg of racing's Triple Crown. The Preakness follows two weeks after the Derby at the Pimlico Race Track in Maryland and the Belmont Stakes, in New York, are 3 weeks after that, the last and longest of the three races. The last Triple Crown winner was Affirmed in 1978.
Animal Kingdom was the 2011 winner of the Kentucky Derby, ridden by John Velaquez (his first derby win). An attendance record was set last year, with 164,858 race fans on hand to catch the Run for the Roses.