Are Boston Marathon qualifying times fair?

A 45-year-old woman chasing 3:45 and a 30-year-old man chasing 2:55 both need a Boston qualifier. Are they being asked for the same effort? I scored all 22 brackets against three different references to find out. The answer splits the usual argument in two.

The question nobody answers

To apply for Boston you need a qualifying time; the BAA's entry rules leave charity places as the main other way in. You earn the time at another marathon within the qualifying window, and it has to beat the standard for your age and gender. Other World Marathon Majors take time qualifiers too (Chicago guarantees a place to anyone under its standard), but they also hold a drawing open to everyone.

For the 2026 race the BAA cut five minutes from every standard below age 60. There were 33,249 applications for about 24,000 qualifier places, and even after the cut a runner needed to beat their standard by 4 minutes 34 seconds to get in.

The BAA has never said how it sets each bracket's time. Its announcements refer to "careful analysis of results data" without saying whether the goal is equal difficulty, equal selectivity, a target field size or continuity with past standards.

The data

The analysis covers every bracket in the 2026 standards: 11 age groups for men and for women. Non-binary athletes are excluded because the BAA says it does not yet have enough data to set standards for that category.

• 2026 BAA qualifying standardsbaa.org
• Open marathon world recordsWorld Athletics
• Masters records, M40 to W80+Wikipedia masters list, WMA
• WMA age-grading factorsWMA 2023 Appendix B
• 2026 field sizeBAA press releases

The open records are Sabastian Sawe's 1:59:30 (London, April 2026, ratified by World Athletics in July 2026) for men and Ruth Chepngetich's 2:09:56 (Chicago 2024) for women. Chepngetich is serving a three-year ban, announced by the Athletics Integrity Unit on 23 October 2025, after a positive test for the diuretic hydrochlorothiazide on 14 March 2025; the AIU said her records from before that test stand while it looks into other material from her phone, and the World Athletics all-time list still puts 2:09:56 first (checked 28 October 2026). At the other end, the 80+ references are Ed Whitlock's 3:15:54 and Yoko Nakano's 4:11:45.

Three definitions of fair

Each framework asks the same thing in a different way: does every bracket sit at the same distance from its reference?

1. Framework 1

   World-record multiplier

   Divide each bracket's standard by its world record. Under uniform difficulty every bracket would land on the same multiplier.

   multiplier = BQ_time / world_record

   Transparent, and one exceptional record can move a whole bracket.

2. Framework 2

   Top-three records

   Replace the single record with an average of the top three. The second and third marks are estimated at 3% and 6% slower than the record for brackets with depth, and 5% and 10% for 70+.

   multiplier = BQ_time / mean(top3)

   Less sensitive to one record, but partly estimated.

3. Framework 3

   WMA age grading

   World Masters Athletics publishes age factors for the expected decline in performance with age. This asks what share of age-specific potential each standard demands.

   AG% = (open_WR / WMA_factor) / BQ × 100

   Built on population data, so no single record sets a bracket; the assumptions sit inside the factor tables.

What the numbers say

Under Framework 1 the median multiplier across all 22 brackets is 1.50×: the typical standard is half again as slow as the bracket's world record. The interesting part is the spread around it.

The men's bars all fall between 1.43 and 1.53, a range of 0.10. The women's span 0.35. A Welch t-test on the means returns p = 0.81, so there is no detectable difference in average difficulty. Levene's test for equal variance returns p = 0.036: the spreads differ.

1. No mean-level gender bias

   Welch t-test p = 0.81 under the world-record framework and p = 0.68 under age grading. The claim that Boston is harder for women, or for men, does not survive the test.

2. Women's standards are less consistent

   The coefficient of variation is 1.9% for men and 6.6% for women under the world-record framework, 2.1% and 7.3% with top-three records, and 4.0% and 7.8% under age grading. W35–39 sits at 1.62× its record and W80+ at 1.27×.

3. W80+ is the most miscalibrated bracket

   The standard is 57 minutes stricter than a uniform multiplier would set it, and 56 minutes stricter under age grading. Both frameworks point at the same bracket.

What does a 1.50× multiplier mean in practice? Sawe's 1:59:30 times the median gives about 2:59 for men 18–34, close to their 2:55 standard. Apply the same proportion to every bracket and you get a "uniform" standard to compare against.

The younger women's brackets (18–34, 35–39, 45–49) sit 10 to 15 minutes on the lenient side. From 70 up the women's brackets turn strict. The men's stay within about 10 minutes of zero.

Did the 2026 tightening help?

The 2026 cut was the largest single tightening since 1990: five minutes for every bracket under 60. The BAA gave record demand and faster fields as the reasons. The question here is whether it also changed the spread across brackets.

A flat cut within each gender leaves the shape of the table in place, and the 60+ brackets were not touched. Measured against the same records, the women's CV was 7.3% under the 2020–2025 standards and is 6.6% in 2026; the men's went from 1.8% to 1.9%. The change answered demand and left the spread across brackets close to where it was.

It did make one step steeper. Under the 2020–2025 standards a 59-year-old man needed 3:35 and a 60-year-old 3:50, a 15-minute step. In 2026 the step is 20 minutes, and the same is true for women.

How much the result depends on the records chosen

I re-ran the world-record framework three ways to see whether a single record or reference choice drives the variance gap: dropping W80+, using Sinead Diver's 2:21:34 as an alternative W40–44 reference, and using Tigst Assefa's women-only record (2:15:41) for W18–34 in place of the mixed-race mark.

W80+ carries about a third of the women's spread. Dropping it takes the women's CV from 6.6% to 4.5%. It is also the bracket most dependent on one athlete's record.

Alternative records barely matter. Diver's mark leaves the women's CV at 6.6%; Assefa's moves it to 6.4%. The men's CV is 1.9% in every scenario.

The gap survives every scenario. Even without W80+, the women's CV is more than twice the men's.

What to take from it

The data cannot say which framework is correct; that is a choice about what fairness means. Framework 1 fits the view that standards should track current records. Framework 3 fits the view that they should track expected decline with age. If the BAA is aiming at selectivity, field size or continuity, none of the three captures it.

What the data does say: the averages are balanced. Mean difficulty is the same for men and women under each framework tested. The consistency is not. The women's standards vary much more from bracket to bracket, and W80+ is an outlier under every framework.

If the BAA were to revisit one bracket, the data points at W80+. Easing it by 30 to 50 minutes would bring it in line with the rest of the table under both the world-record and age-graded frameworks. It would affect a few dozen runners a year.

A published method, even one that produced the same times, would let runners and coaches judge the standards on their own terms.

Limitations

There are 11 brackets per gender, so the tests are underpowered, and the Levene result (p = 0.036) is from the world-record framework only. The top-three marks are estimated. The 18–34 and 35–39 brackets share the open record because there is no separate record below 40, which makes 35–39 look more lenient. And "fair" here means equal proportional difficulty against a reference; other definitions could reach other verdicts.