The St. James's Palace Stakes is a Group 1 flat horse race in Great Britain open to three-year-old colts. It is run at Ascot over a distance of 1 mile (1,609 metres), and it is scheduled to take place each year in June.The event is named after St. James's Palace, a royal residence during the Tudor period. It was established in 1834, and the inaugural race was a walkover.The present system of race grading was introduced in 1971, and for a period the St.