Your Odds in the Boston Qualifier Selection

Published September 9, 2026 · Estimates, updated each registration cycle

Short answer: if you miss the cutoff for the 2027 Boston Marathon, the new Boston Qualifier Selection gives you somewhere in the region of a 1 in 9 to 1 in 12 chance of getting in anyway. About 1,000 places are drawn at random from the applicants who beat their standard but not the cutoff, and in recent cycles that group has numbered roughly 9,000 to 12,000 people. Nobody knows the exact figure until applications close on September 18, 2026, so every number below is a scenario rather than a promise.

What the pool is made of

The pool is not everyone who wants to run Boston. It is only the runners who applied during registration week with a legitimate qualifying time and then finished behind the cutoff line for their age group and gender. Entry is automatic: no extra form, no extra fee, no separate deadline. The mechanics of the draw are covered in the qualifier selection explainer.

Recent cycles give a decent sense of the scale. For the 2026 race the Boston Athletic Association received 33,249 qualifier applications, accepted 24,362, and turned away 8,887 runners who had all run a qualifying time. For 2025 the shut-out group was larger still, at more than 12,000. Those two numbers bracket the realistic range for 2027, with the caveat that a new second chance may itself tempt more borderline qualifiers to apply, which would make the pool bigger and the draw thinner.

What 1,000 places are worth

The arithmetic is simple division, and it is worth seeing written down.

So the honest headline is single digits to low double digits. That is far better than the flat rejection of previous years, and far worse than a plan. Note also that the draw appears to be flat: a runner who missed by two seconds and a runner who missed by twelve minutes are described as having the same chance, so a near miss buys sympathy but not weight.

Your real chance of standing on the start line

The number that actually matters is not the draw in isolation. It is the combination of clearing the cutoff outright and, failing that, winning the draw. The table below runs that combination for a range of buffers, using our central estimate of a 5:15 cutoff and a mid-range pool of 10,500 people sharing the 1,000 places.

Read the third column carefully. For a thin buffer the draw does almost all of the work, lifting a one or two percent long shot into double digits. For a buffer near the predicted cutoff it adds only a few points, because you were probably getting in on merit anyway. The draw adds close to the same number of percentage points for everyone below the line, which matters far more to the runners who had almost no chance. Either way the direction is the same: applying is worth more than it was last year, which is the point made at length in the case for applying with a small buffer.

Three things this does not change

It does not change the cutoff. The cutoff is still set by ranking applicants by buffer and filling the field from the fastest down. The BAA has not spelled out whether the 1,000 random places sit on top of the qualifier allocation or inside it, so treat any cutoff estimate, ours included, as unaffected by the draw for now.

It does not change your application. There is nothing to opt into and nothing to tick. Submit the strongest qualifying time you have inside the window and let the process sort it out.

It does not change the timeline. Applications run September 14 through 5:00 p.m. ET on September 18, 2026, and everyone hears back by early October. The draw is resolved inside that same window, not as a separate later event, as set out in the registration timeline.

What to do with the number

Use it as a tiebreaker, not as a strategy. If you were on the fence about applying with a buffer you think is too small, an extra several percent on top of your direct odds settles it: apply, because nothing is charged unless you are accepted. If you were already comfortably clear of the estimate, the draw is irrelevant to you. To see which of those two runners you are, put your age, gender and finish time into the cutoff predictor. It gives you your buffer, your estimated odds against the 2027 forecast, and whether that buffer would have been accepted in each of the last thirteen Boston fields.