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 La Force can serve as a trial for the Prix du Jockey Club. The last horse to win both races was Saonois in 2012. The 2002 winner "Diaghilev" was later exported to Hong Kong and renamed "River Dancer". <br> <br> Prix La Force The Prix La Force is a Group 3 flat horse race in France open to three-year-old thoroughbreds. It is run over a distance of 2,000 metres (about 1¼ miles) at Longchamp in April. The event is named in memory of the Duc de La Force, Bertrand Nompar de Caumont (1840–1909), a member of the Société d'Encouragement. It was established