John St. Leger was a notable figure in the history of horse racing, particularly known for his role in establishing the St. Leger Stakes, one of the oldest and most prestigious horse races in the world. This race, first held in 1776, takes place annually at Doncaster Racecourse in England and is part of the British Classics series. St. Leger was also a landowner and a member of the British gentry. His contributions to the sport of horse racing have left a lasting legacy, and the race named after him continues to attract attention from racing enthusiasts and participants alike.