The BAA received 33,058 qualifier applications during registration week Sept. 11-15. With a field size of just 30,000, and room needed for elites, wheelchair and para-athletes, and thousands of charity runners, more than 11,000 runners who achieved the famous “BQ,” one of the most coveted goals for any avid longest-distance runner, had to be turned away.

The BAA instituted its “rolling admissions” process in 2012 as participation demand began to outpace the maximum field size, giving priority to faster qualifiers. In the years since, the “cutoff time” needed to get into the Boston Marathon has steadily grown from 1 minute, 14 seconds in 2012 to 4 minutes, 52 seconds in the last pre-COVID race in 2019. The 2021 Marathon had the strictest cutoff at 7 minutes, 47 seconds, but that mark was heavily skewed by the field size being cut by a third from the typical 30,000 to just 20,000 because of COVID restrictions.

For back-to-back years, the BAA was able to accept all qualified athletes, but that was an anomaly. As the long-distance running calendar returns to semi-normalcy after the pandemic and qualifier marathons are back and thriving, the cutoff is tightening again.

The minimum qualifying times were last adjusted ahead of the 2020 race — which was eventually canceled — to 3 hours for men aged 18-34 and 3 hours, 30 minutes for women 18-34, increasing by 5 minutes for every five-year bracket thereafter.

This year’s qualified field includes 12,535 men, 9,440 women, and 44 non-binary athletes.

Amin Touri can be reached at amin.touri@globe.com.