Home / Geldings in the Arc: Why the 2027 Rule Change Has Split Racing

Geldings in the Arc: Why the 2027 Rule Change Has Split Racing

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Last Updated on 14/10/2026

Fact checked by: Jordan Noble

Can geldings run in the Arc?

The Prix de l’Arc de Triomphe was first run in October 1920, and it has taken place every year since, aside from 1939 and 1940, when it was cancelled due to World War II. Notably, the Arc has always been restricted to colts, fillies, or mares aged three years or above.

However, in June 2026 France Galop voted in favour of allowing geldings to run in the Arc from 2027 onwards, which was later approved by the European Pattern Committee. The upcoming changes have become a hot topic, one which has left the world of racing divided, and that's what today's guide is all about.

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Geldings in the Arc - Yes or no?

Today I’m looking at the European Pattern Committee’s decision to approve the proposal put forward by France Galop, which will allow geldings to run in the Prix de l’Arc de Triomphe, aka ‘The Arc’, from 2027 onwards. In the rest of this article, I’ll explain what that means, along with the arguments for and against the change.

What is a gelding?

Let’s start with the basics. In simple terms, a gelding is a male horse that has been castrated, which means it has undergone a veterinary procedure to remove its testicles. In turn, that may well lead you to ask why horses are gelded?

Well, the answer mainly comes down to hormonal behaviour. Entire horses are naturally more aggressive and can be difficult to handle as a result. Castration reduces testosterone levels, which makes horses calmer, and more able to maintain focus during training. In turn, this makes life a lot easier for everyone from the stable staff who handle them, to the trainer, and the jockeys who ride them.

Another consideration is whether a horse is genuinely ‘good enough’ to have a stud career in the future. In reality, only a very small percentage of male thoroughbred horses make the grade, and there’s no good reason to keep those who don’t entire.

The argument for allowing geldings to run in the Arc

France Galop promotes the Arc as the “de facto world championship of thoroughbred racing”. In other words, it represents the best of the best middle-distance turf horses competing to see which of them is the true champion of the world. This statement is somewhat undermined by the fact that some of the best horses are excluded due to being gelded. Recent examples include Calandagan, Goliath and Rebel’s Romance.

The restriction on geldings running in the Arc has often been questioned. Largely because other major races around the world over the same distance allow geldings to run. Three such examples are the King George in the UK, the Japan Cup, and the Breeders’ Cup Turf in the US. All of those races are typically stronger, and more competitive for the inclusion of geldings.

France Galop also argues the longevity point when it comes to geldings. A successful entire racehorse can go on to enjoy a long career as a stallion at stud after racing. That leads to a concern that horses may have their racing careers cut short, and be retired to stud before they suffer a downturn in form, or a life-threatening injury. Conversely, geldings usually continue to race on for far longer, and consequently build a fan base. France Galop maintains that allowing these so-called ‘fan favourites’ to run would raise the profile of the Arc considerably.

The argument for upholding the ban on geldings in the Arc

There are various reasons for people to disagree with the decision. If you were to ask a horse racing purist, they would maintain that it’s wrong to mess around with the rules of a race that has been running for over one hundred years. With so much history and prestige, they feel the race should be left alone to continue on as it has throughout its history.

From a more hands on perspective, I mentioned earlier that geldings are generally considered easier to train than entire horses. Ballydoyle trainer Aiden O’Brien recently backed that up by stating: “It’s so much easier to train a gelding in every way so, unfortunately, the reality of it is that there will be an unfair advantage to the geldings in the race now”.

For owners and breeders, the knock-on effect could be enormous. If you are looking to breed from your colt, filly or mare when their racing career ends, their value in that sphere is reliant on their achievements. As such, winning the Prix de l’Arc de Triomphe would add considerable value to their future progeny. However, if geldings are allowed to run and your horse is beaten by them, that value is irretrievably lost.

Although it is a shame in some ways that the best geldings cannot run in the Arc, which sometimes means the best horses of a generation are excluded, there are already plenty of other opportunities out there for them in fairness.

Should geldings be allowed to run in Arc?

Ultimately, you can make a strong case for both sides of the Arc debate, and your personal stance will likely come down to your level of involvement in the sport of horse racing.

Allowing geldings to run in the Prix de l’Arc de Triomphe will see some of the best horses in the world face one another. Just as we already see in other major races like the King George, adding strength to the Arc will make for better viewing, and seeing the same horses competing in the race will add to their popularity. So for certain types of racing fans, race organisers, media companies, and the owners and trainers of said geldings, allowing them to run is a big positive.

On the other hand, excluding geldings from the Arc not only keeps the purists happy, it also maintains a sense of equilibrium. Ignoring the female aspect for a moment, if colts are only competing against other colts, handling the testosterone element is simply a part of the equation for all concerned. It also means Arc winners can go on to a successful breeding career, which let’s face it, is not only fantastic for owners and breeders, it’s vital for the future of the sport itself.

After assessing the debate from both angles, I’m sure you are all keen to know my thoughts on the subject. Personally, I don’t think geldings should be allowed to run in the Arc, and I’m of the opinion that they would have an unfair advantage. I also don’t believe such a major change is appropriate for a historic race like this one. Other classic races including the Epsom Derby, the 2000 Guineas, the St Leger, and their Irish or French equivalents all exclude geldings from entering them, and these traditions should be upheld and protected.

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