Marathon from the start at Windsor Castle to the royal entrance to the White City Stadium, followed by a lap (586 yards 2 feet; 536 m) of the track, finishing in front of the Royal Box. The course was later altered to use a different entrance to the stadium, followed by a partial lap of 385 yards to the same finish. The modern standard distance for the marathon was set by the International Amateur Athletic Federation (IAAF) in May 1921 directly from the length used at the 1908 Summer Olympics in London. An official IAAF marathon course is 42.195 km (42
Marathon Stakes Marathon Stakes The Marathon Stakes, formerly known as the Breeders' Cup Marathon, is a Grade II American Thoroughbred horse race. It is open to horses three years old and up, and contested on dirt at a distance of miles. The race has a purse of US$200,000. The horses carry Set Weights with allowances. The race was originally established in 2008 as part of the annual Breeders' Cup World Championships with its inaugural running at a distance of miles. The inaugural running took place on the second day of the Breeders' Cup on the Pro-Ride synthetic dirt at the 2008 host