The Iditarod is an annual long-distance sled dog race that takes place in Alaska. It covers a distance of over 1, 000 miles and is considered one of the most difficult races in the world. The Indy 500 is an annual automobile race held at the Indianapolis Motor Speedway in Indiana. It is the largest single-day sporting event in the world and is known as the 'Greatest Spectacle in Racing'. The Kentucky DERBY is an annual horse race held at Churchill Downs in Louisville, Kentucky. It is the oldest continuously held sporting event in the United States and is often referred to as 'The Most Exciting Two Minutes in Sports'. The Monaco Grand Prix, or Prix de Monaco, is an annual Formula One motor race held on the Circuit de Monaco in Monte Carlo, Monaco. The OAKS is an annual horse race held at Epsom Downs Racecourse in Surrey, England. It is the third leg of the British Triple Crown and is one of the most prestigious flat races in Europe.