The Prix de l'Arc de Triomphe is a Group 1 flat horse race in France open to thoroughbreds aged three years or older. It is run at Longchamp over a distance of 2,400 metres (about 1½ miles), and it is scheduled to take place each year, usually on the first Sunday in October.
Its roll of honour features many highly acclaimed horses, and its winners are often subsequently regarded as champions. It is currently the world's second richest turf race (behind The Everest).
A slogan of the Prix de l'Arc de Triomphe, first used on a promotional poster in 2003.