More than 100,000 people can fill these stands at Churchill Downs in Louisville. During the Kentucky Derby, the crowd sips mint juleps while watching three-year-old thoroughbreds race two kilometers in about two minutes. This annual tradition on the first Saturday in May began in 1875. Over time, Churchill Downs has expanded into a venue for car races, concerts and other events. However, the track will always be known as the host for the Kentucky Derby as chronicled in their museum.