Zarkash: Racing’s Greatest What If — The Sea The Stars x Zarkava Colt Who Never Raced

Last Updated on August 15, 2026

Every so often, racing falls in love with an idea rather than a horse.

Zarkash was one of those ideas. On paper he was as close as you get to a sure thing: a bay colt by Sea The Stars, out of Zarkava, the undefeated Arc winner the Aga Khan called the peak of his family’s breeding.

He was priced at 50/1 for the Epsom Derby before he had so much as a foal photo in the Racing Post, and he never made it to a racecourse.

Born into racing royalty

Zarkava herself was a once‑in‑a‑generation mare.

Unbeaten in seven starts, she took the Poule d’Essai des Pouliches, Prix de Diane and Prix de l’Arc de Triomphe, quickening through trouble at Longchamp like the laws of physics didn’t quite apply to her.

She was the product of the Aga Khan’s deep “Z” family: Zamindar over Zarkasha, a Kahyasi mare whose line is loaded with middle‑distance stamina.

When she went to Sea The Stars at Haras de Bonneval, it felt like a fantasy mating made real. Sea The Stars had completed his own Derby–Arc double, his first crops already producing top‑class middle‑distance horses across Europe.

The resulting foal, dropped on 11 February 2011, was always going to be under a spotlight. He was named Zarkash and handed to Alain de Royer‑Dupré at Chantilly, the same trainer who had handled his dam.

Hype before a single stride

Zarkash didn’t need to set foot on a racecourse to move a market.

Bookmakers put him in the Epsom Derby lists at 50/1 almost as soon as his pedigree page hit the press: Sea The Stars over Zarkava, bred and raced by the Aga Khan, in France but with Classic options everywhere.

The hype came from one simple racing instinct: if you cross two giants, something extraordinary might happen.

Zarkash represented the old‑fashioned dream – a beautifully bred, late‑maturing colt who might roll through ten, twelve furlongs and keep going.

Setbacks and a quiet struggle

Reality was much more fragile.

Early reports from the Aga Khan team were measured. Zarkash was described as “a strong colt who looks like his sire and is very correct”, a big unit who was never expected to be a sharp two‑year‑old.

By mid‑2014, the French stud manager Georges Rimaud admitted he had suffered a setback to his right hind leg and needed time off, but optimism remained that he would get to the track later that season and be campaigned as a four‑year‑old.

Behind those lines sat the reality of any big, backward colt: managing bone, muscle and mind through the long, quiet work on the Chantilly gallops. There are no headlines for steady canters at first light.

A career that ended before it began

In October of his three‑year‑old season, Zarkash fractured a hind leg on the gallops and was euthanised, his career over before it had even begun.

For Zarkava’s camp, it was the second cruel blow in quick succession: another colt, Zarkar by Galileo, would later also fail to race and die after a fracture in Argentina.

What might have been

It is tempting to project greatness onto Zarkash because of who his parents were.

His half‑brother Zarak, by Dubawi, did make it. He won the Grand Prix de Saint‑Cloud, hit the frame repeatedly at Group 1 level, and is now one of the most upwardly mobile sires in Europe, standing at Haras de Bonneval.

If Zarak could do that, what might a sound, Zarkash – Sea The Stars over that same Zarkava base – have done? A middle‑distance campaign in France, a tilt at the Arc she once owned, a King George, a trip to Ascot or Leopardstown? We will never know, and that uncertainty is part of his pull.

Racing loves its ghosts almost as much as its champions. Some, like Shergar, vanished after lighting up the track. Others, like Zarkash, never got beyond the morning work.

The greatest horse we never saw?

Calling Zarkash “the greatest racehorse” is deliberately provocative. Strictly, you cannot be a great racehorse if you never race.

But greatness in this game is also about what a horse carries on its back: expectation, heritage, the weight of a stud farm’s history and a fanbase’s imagination. Zarkash had all of that from birth.

In a sport built on hope and risk, that is sometimes enough for a legend of a different kind.