The 2011 Prix de l'Arc de Triomphe was a horse race held at Longchamp on Sunday 2 October 2011. It was the 90th running of the Prix de l'Arc de Triomphe.
The winner was Danedream, a three-year-old filly trained in Germany by Peter Schiergen. The winning jockey was Andrasch Starke.
Danedream was the second German-trained horse to win the "Arc". The only prior victory was that of Star Appeal in 1975.
The winning time of 2m 24.49s set a new record for the event. The previous record of 2m 24.60s was achieved by Peintre Celebre in 1997.
Unusually for the race, the first three finishers were all fillies.
Further details of the winner, Danedream.