Prix du Gros Chêne horse, Fine Art. The race returned to its original venue, Chantilly, in 1957. The present system of race grading was introduced in 1971, and for a period the Prix du Gros Chêne held Group 3 status. It was promoted to Group 2 level in 1988. The race is now held on the same day as the Prix du Jockey Club. Prix du Gros Chêne The Prix du Gros Chêne is a Group 2 flat horse race in France open to thoroughbreds aged three years or older. It is run at Chantilly over a distance of 1,000 metres (about 5 furlongs),
Prix du Jockey Club Club was staged at Longchamp in 1941 and 1942, and at Le Tremblay over 2,300 metres in 1943 and 1944. It returned to Longchamp for the following three years, and on the second occasion it was opened to foreign participants. The present system of race grading was introduced in 1971, and the Prix du Jockey Club was classed at the highest level, Group 1. The first foreign-trained horse to win was Assert in 1982. The distance was shortened to 2,100 metres in 2005. Nine winners of the Prix du Jockey Club have subsequently won the Prix de l'Arc de Triomphe.