The St Leger Stakes is a Group 1 flat horse race in Great Britain open to three-year-old thoroughbred colts and fillies. It is run at Doncaster over a distance of 1 mile, 6 furlongs and 115 yards, and it is scheduled to take place each year in September.

Doncaster Racecourse is a racecourse in Doncaster, South Yorkshire, England. It hosts two of Great Britain's 36 annual Group 1 flat races, the St Leger Stakes and the Racing Post Trophy.