High Quality Content by WIKIPEDIA articles! The Queen Elizabeth II Stakes is a Group 1 flat horse race in Great Britain which is open to thoroughbreds aged three years or older. It is run at Ascot over a distance of 1 mile (1,609 metres), and it is now scheduled to take place each year in October. As of 2011, it is run on Champions Day as the final race of the mile category of the British Champions Series. Traditionally, it was run in September.