The Prix de Diane is a prestigious horse race held annually in France, specifically at the Hippodrome de Chantilly. It is part of the French flat racing calendar and is exclusively for three-year-old fillies. The race typically takes place in June and is run over a distance of 1,600 meters (approximately one mile). As one of the highlights of the French racing season, the Prix de Diane attracts top horses and trainers from around the world. It is often compared to the Epsom Oaks in the United Kingdom, showcasing the talent and potential of young female thoroughbreds.