Prix de Sandringham du Jockey Club. Prix de Sandringham The Prix de Sandringham is a Group 2 flat horse race in France open to three-year-old thoroughbred fillies. It is run at Chantilly over a distance of 1,600 metres (about 1 mile), and it is scheduled to take place each year in late May or early June. The event was originally called the Prix des Lilas, and it used to be held at Longchamp. During the early part of its history it was contested over 2,000 metres, and it served as a trial for the Prix de Diane. It was cut to its present
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.