Prix de Royaumont introduced in 1978, and the race was moved to a date earlier than that of the Prix de Diane. The event was staged at Longchamp from 1987 to 1990, and it was transferred to Saint-Cloud in 1991. Its distance was extended to 2,400 metres in 1992, and it continued to take place at Saint-Cloud until 1996. The race's only subsequent departure from Chantilly was in 2001, when it was run at Saint-Cloud. The Prix de Royaumont is now held on the same day as the Prix du Jockey Club. Prix de Royaumont The Prix de Royaumont is a Group 3
Prix du Cadran Prix du Cadran The Prix du Cadran is a Group 1 flat horse race in France open to thoroughbreds aged four years or older. It is run at Longchamp over a distance of 4,000 metres (about 2½ miles), and it is scheduled to take place each year in early October. It is France's most prestigious race for "stayers" – horses which specialise in racing over long distances. It is the French equivalent of the Gold Cup, the leading stayers' race in Great Britain. The event is named after a clock face ("cadran") at the École Militaire, a building located alongside