Which Race at the St Leger Costs the Most to Bet In?

The big handicap, every time. And the St Leger Stakes itself, the race the whole week is named after, will be among the cheapest on the card.

That sounds backwards, so here is the reason, and it has nothing to do with prestige, prize money or the quality of the horses. It is the number of runners.

We have measured the charge built into the starting-price book on 230 races across seven festivals this summer. The relationship between field size and what a race costs to bet in is the strongest pattern in everything we have looked at, and it is close to mechanical.

The St Leger Stakes is a Group 1 (Classic) over 1m 6f 115y for 3yo colts and fillies (no geldings), first run in 1776. Classics draw small, select fields. The sprint handicaps on the same card draw very large ones. Those two facts, and not the billing, decide which race takes more out of your money.

What we measured

Every race at seven festivals this summer, grouped by how many runners went to post.

Read the overround column down. The biggest fields carry close to three times what the smallest do, and the takeout column says the same thing in the share of stakes that never comes back.

The mechanism is simple enough to check by hand. A bookmaker prices every runner and takes a slice on each one, and the slices at the back of the market are the fattest, because a horse quoted at 66/1 wins considerably less often than one time in sixty-seven. A twenty-runner handicap has several of those. A nine-runner Group race has none.

Sorting the same races by grade instead tells a weaker version of the same story.

Group races look cheap, and they are, but once you allow for field size most of that difference disappears. Group races are cheap because they are small, not because they are good. That distinction is the whole point: if you are picking a race to bet in, do not look for the classy one, look for the short field.

What that means at Doncaster

The meeting runs Thursday to Sunday, and the St Leger Stakes is run on the Saturday. Look down any day's card before you bet and the field sizes will spread from single figures to the high teens on the same afternoon, at the same track, with the same bookmakers taking the bets.

On our summer numbers that spread is worth roughly a threefold difference in what you are charged. It is printed on the racecard, it needs no opinion about a horse, and it is visible before the first race.

We are not going to tell you which horse will win the Leger, and we would be suspicious of anyone who did. What we can tell you is that history says the race tends to go to the front of the market: the last two winners went off at St Leger Stakes-typical single-figure prices, Scandinavia at 2/1 favourite in 2025 and Jan Brueghel at 11/4 the year before, both for Aidan O'Brien, who has now won it nine times and takes a fourth in a row this week.

That is a fact about the past. It is not a tip, and a short price on a Classic is still a price with the bookmaker's charge inside it.

If you want the runners, the times and the rest of the meeting, our St Leger Festival guide has them. This page is only about what the week costs.

Common questions

When is the St Leger run?

The St Leger Stakes is run on the Saturday of the meeting, which spans Thursday to Sunday. It is a Group 1 (Classic) over 1m 6f 115y.

Which race on the card is cheapest to bet in?

Almost always the one with fewest runners. Across 230 festival races this summer, the smallest fields carried around a third of the charge the biggest did.

Why do big handicaps cost more?

Each runner priced carries a slice of the bookmaker's charge, and the long-priced runners at the back of the market carry the heaviest. A big handicap has many more of them, and they attract the least scrutiny.

Is the St Leger good value then?

Cheaper than the handicaps around it, on the field-size pattern. Cheaper is not the same as profitable: no approach we have tested across 29,286 races makes money, and a small-field Classic is no exception.

Who has won the St Leger most recently?

Scandinavia in 2025 and Jan Brueghel in 2024, both trained by Aidan O'Brien, who has won the race nine times in total.

Do you tip the St Leger?

No. Everything here is published research, including every losing figure, and there is nothing to subscribe to.

A word on all of this

None of these pages is a tip, and none describes a way to win. If your betting has stopped being fun, BeGambleAware has free, confidential help, and the National Gambling Helpline is on 0808 8020 133.