The St Leger Stakes is the oldest of Britain’s five Classics. It has been run at Doncaster since 1776, and on Saturday 12 September 2026 the race reaches a landmark: the 250th running of the Betfred St Leger. Post time is 15:40 on the Doncaster turf.
Declarations are now confirmed. Seven runners go to post after Saratoga was withdrawn from the entries. It is a smaller field than the Classic often attracts, but it is not a shallow one. Aidan O’Brien alone saddles three of the seven, and the market is led by a horse with a Group 1 win already banked this season.
The Distance Question
The St Leger is run over an extended Classic distance, and that shapes the whole race. Horses that have shown speed over shorter Classic trips earlier in the season now have to prove they stay considerably further. It rewards form that has trended toward stamina as the season has progressed, and it exposes anything whose class has masked a doubt over the trip.
Scandinavia Heads the Market
Scandinavia is the 5/4 favourite, trained by Aidan O’Brien and ridden by Tom Marquand. He arrives with a Group 1 win in this season’s Goodwood Cup already secured, form that speaks directly to the stamina question the St Leger poses. A Goodwood Cup winner has already shown he can last out a searching test of stamina, which is why the market has made him favourite here.
Lambourn: Derby Class, But a York Question Mark
Lambourn is second favourite at 5/2, also trained by O’Brien, with Sean Levey taking the ride. He is a dual Derby winner this season, form that puts him among the most decorated three-year-olds in the field on pure Classic form. But his most recent start, at York, disappointed. That form dip is the central question around his price. His Derby form is a strong stamina reference for the extra distance here, but a below-par run since means his participation carries more uncertainty than his Classic record alone would suggest.
Stay True: The Lightly Raced O’Brien Third String
Stay True completes O’Brien’s three-pronged raid, ridden by Mickael Barzalona. He is lightly raced, which cuts both ways: there is less to go on, but also less mileage on the clock and less exposed form for rivals to pick apart.
The Jockey-Booking Wrinkle
There is a wrinkle behind the O’Brien trio’s bookings: Ryan Moore, the trainer’s number one jockey, is unavailable through injury, and Wayne Lordan is suspended. That is why Tom Marquand, Sean Levey and Mickael Barzalona, rather than O’Brien’s usual first-choice riders, take the mounts on Scandinavia, Lambourn and Stay True. It does not change the horses’ form, but it is a relevant fact for anyone assessing how each of the three is likely to be ridden. O’Brien is seeking a third consecutive St Leger victory with this trio.
Carmers: Royal Ascot Form in the Book
Carmers, trained by Paddy Twomey and ridden by Billy Lee, is priced at 9/2. He won the Queen’s Vase at Royal Ascot in June this season, a race run over an extended distance that is itself a recognised stepping stone to the St Leger. That form is squarely relevant to today’s test and gives Carmers a legitimate case as the main challenger to the O’Brien contingent.
The British Challenge: Furthur and Tarriance
Andrew Balding saddles two runners, Furthur and Tarriance, and leads the home challenge to the Irish-trained majority in this field. Furthur, ridden by Oisin Murphy, is named as the stable’s leading hope, with stablemate Tarriance, under Colin Keane, completing the pair. Two runners from the same yard gives connections options as the race develops, and it means the Balding form has to be read across both horses rather than in isolation.
Rahiebb: The Outsider
Rahiebb, trained by Roger Varian and ridden by Ray Dawson, is the outsider of the field. Longer-priced runners in Classic races are rarely there simply to make up the numbers, but the price reflects where the market currently sees his chance relative to the six above him.
Where This Leaves the Race
Seven runners is a workable book for a Group 1 Classic, and this field has a clear leaning: Scandinavia’s Goodwood Cup form gives him a stamina case that nothing else in the field can match on the same terms, which is reflected in his 5/4 price. Lambourn’s Classic pedigree keeps him squarely in contention despite the York form dip, and Carmers arrives with Royal Ascot form that translates well to this distance. The Balding pair and Rahiebb complete a field where the market has done a reasonable job of ranking what is currently known.
None of this amounts to a certainty. Form over an extended trip in a small but high-class field can turn on pace, and the jockey changes among the O’Brien runners add a layer of uncertainty that pure formlines do not capture. The 250th St Leger looks a genuinely open, well-matched renewal at the top of the market rather than a formality for the favourite.
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