It seems the Arc trials have not been taken very seriously by the industry any more. The 2017 field of 8 is headlined by Ribchester and the line-up includes the American Tareef as well as Lady Frankel & Lightning Spear. Ribchester was supposed to be taking a break but his trainer felt otherwise. The Prix du Moulin de Longchamp (Gr1, 3+, 1,600m) also run at Chantilly, is open to thoroughbred colts & fillies. It was one of two major races introduced to celebrate Longchamp's centenary in 1957. Both initially took place on the first Sunday in October, the same day as the Prix de l'Arc de Triomphe. The other race, the Prix de l'Abbaye de Longchamp, is still held at that meeting.
| Gate | Horse Name | Age | Origin | Sex | Pedigree | Trainer | Owner | Jockey | Race Form |
| 1 | Massaat | 4 | IRE | M | Teofilo (IRE) - Madany (IRE) (Acclamation) | Owen J. Burrows | H Al Maktoum | J. Crowley | 1,7,9 |
| 2 | Taareef | 4 | USA | M | Kitten's Joy (USA) - Sacred Feather (USA) (Carson City (USA)) | J C Rouget | H Al Maktoum | C. Soumillon | 2,1,1 |
| 3 | Zelzal | 4 | FR | M | Sea The Stars (IRE) - Olga Prekrasa (USA) (Kingmambo (USA)) | J C Rouget | Al Shaqab Racing | G. Benoist | 4,2,3 |
| 4 | Robin Of Navan | 4 | FR | M | American Post - (Muhtathir) | H J L Dunlop | Cross/deal/foden/sieff | C. Demuro | 8,2,4 |
| 5 | Ribchester | 4 | IRE | M | Iffraaj - Mujarah (IRE) (Marju (IRE)) | R A Fahey | Godolphin | J. Doyle | 2,1,1 |
| 6 | Lightning Spear | 6 | IRE | M | Pivotal - Atlantic Destiny (IRE) (Royal Academy (USA)) | D M Simcock | Qatar Racing Limited | O. Murphy | 1,3,7 |
| 7 | Inns Of Court | 3 | IRE | M | Invincible Spirit (IRE) - Learned Friend (GER) (Seeking The Gold (USA)) | A Fabre | Godolphin SNC | M. Barzalona | 2,7,1 |
| 8 | Lady Frankel | 3 | IRE | F | Frankel - Lady Vettori (Vettori (IRE)) | A Fabre | Gestut Ammerland | P. Boudot | 1,6,3 |
1) Tareef
2) Ribchester
3) Lightning Spear