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
Jockey Club Stakes win both races in the same year was Shirocco in 2006. Most successful horse (2 wins): Leading jockey (7 wins): Leading trainer (9 wins): Jockey Club Stakes The Jockey Club Stakes is a Group 2 flat horse race in Great Britain open to horses aged four years or older. It is run over a distance of 1 mile and 4 furlongs (2,414 metres) on the Rowley Mile at Newmarket in late April or early May. The event was introduced by the Jockey Club in 1894. It was originally held in the autumn, and was initially run over 1 mile and