The Kentucky Derby, which first occurred on May 17, 1875, in Louisville, Ky., has been run every year since at fabled Churchill Downs. Often called the “greatest two minutes in sports,” 20 racehorses, all 3-year-old Thoroughbreds, compete in this iconic race on the first Saturday in May, covering a distance of 1 ¼ miles. This year, of course, the Kentucky Derby has been moved to the first Saturday in September due to COVID-19 precautions.