The Prix de l’Arc de Triomphe 2026 at Longchamp is underway, and horse racing fans are gearing up for a thrilling weekend of top-class action. As the live updates roll in, we bring you the latest betting odds, race previews, and key contenders for the prestigious meeting.
Qatar Prix Marcel Boussac: Betting and Preview
The Qatar Prix Marcel Boussac, a Group 1 for juvenile fillies, has attracted a dozen runners. Current odds are led by Green Empress at 7/4, followed by Allela at 7/2 and Data at 6/1. The race has historically been a strong pointer to future Arc contenders, with last year’s winner Diamond Necklace going on to compete at the highest level.
| Horse | Odds |
|---|---|
| Green Empress | 7/4 |
| Allela | 7/2 |
| Data | 6/1 |
| Queen Of The Day | 15/2 |
| Miss Miniver | 10/1 |
| Spirit Tango | 10/1 |
| Ibelieveicanfly | 14/1 |
| So Lovely | 33/1 |
French stables have won 10 of the last 20 renewals, while Irish and British raiders have shared the remainder. Aidan O’Brien has been the most successful visiting trainer with six wins since 2005, but this year his son Joseph saddles the likely favourite, Green Empress. She was runner-up to her father’s impressive Sun Goddess in the Moyglare Stud Stakes and sets a clear standard.
However, local hope Allela, trained by Christophe Ferland, is highly regarded. She steps up to Group 1 company after winning two minor events at Deauville and Chantilly but is just 1lb behind Green Empress on Timeform ratings with fewer races under her belt. Her stable companion Data, third in a Group 2, is another to consider.
Key Takeaways for Bettors
- Green Empress is the market leader but faces stiff competition from French fillies.
- Allela represents the best of the home team and offers value at 7/2.
- Data is a consistent sort who could surprise at 6/1.
- French stables have a strong recent record in this race.
- Keep an eye on Aidan O’Brien’s other runners for each-way value.
Arc Weekend: What to Expect
The Prix de l’Arc de Triomphe itself is the highlight of the weekend, featuring the best middle-distance horses from around the world. With the going likely to be soft, stamina will be at a premium. The live updates will provide real-time odds, non-runner news, and expert analysis to help you make informed bets.

Stay tuned for more updates as the action unfolds at Longchamp.
FAQ
When is the Prix de l’Arc de Triomphe 2026?
The Prix de l’Arc de Triomphe 2026 takes place on the first Sunday of October at Longchamp Racecourse in Paris.
Who is the favourite for the 2026 Arc?
Early favourites include top-class performers from France, Ireland, and Britain. Check live odds for the latest.
How can I watch the Prix de l’Arc de Triomphe 2026 live?
You can watch the race live on major racing channels and streaming platforms. Check local listings for details.
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