The Prix Vermeille is a Group 1 flat horse race in France open to thoroughbred fillies and mares aged three years or older. Preceded by the Poule d'Essai des Pouliches and the Prix de Diane, the Prix Vermeille is the final leg of France's fillies' Triple Crown. The Prix Vermeille is held three weeks before the Prix de l'Arc de Triomphe, and it sometimes serves as a trial for that event. The 2013 winner, Treve was the sixth horse to win both races in the same year.
The Prix du Moulin de Longchamp is a Group 1 flat horse race in France open to thoroughbred colts and fillies aged three years or older. It is run over a distance of 1,600 metres (about 1 mile). The Prix du Moulin de Longchamp was one of two major races introduced to celebrate Longchamp's centenary in 1957. Both initially took place on the first Sunday in October, the same day as the Prix de l'Arc de Triomphe. The other race, the Prix de l'Abbaye de Longchamp, is still held at that meeting.