Prix du Gros Chêne 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), and it is scheduled to take place each year in late May or early June. The event was established in 1857, and it was originally contested over 800 metres. Its title refers to a large oak tree which stood in the grounds of the racecourse – the English translation of "Gros Chêne" is "Great Oak". The race was abandoned because
Prix du Lys Prix du Jockey Club or the Prix de Diane. The Prix du Lys was cancelled in 1940, and was held at Longchamp in 1941 and 1942. It was run at Le Tremblay over 2,300 metres in 1943 and 1944, and at Longchamp again for three years thereafter. The exclusion of Prix du Jockey Club and Prix de Diane entrants ended in 1970. The race was closed to fillies and opened to geldings in 1986. The Prix du Lys was contested over 2,800 metres at Saint-Cloud from 1993 to 1996. In the following years it was run over 2,600 metres at