Lauren HollandBy Lauren Holland

Updated November 2026

The first female Boston Marathon runner was Roberta “Bobbi” Gibb, who ran the race unofficially in 1966 without a bib, starting from the crowd and finishing in about three hours and ten minutes. Women were not officially allowed to enter the race at that time, so her finish was not recorded as an official result. Her run is still the starting point for any discussion of women in the Boston Marathon.

Why Bobbi Gibb’s 1966 Run Was Unofficial

In 1966, the Boston Athletic Association did not permit women to enter the marathon. The rules were based on the belief, common in that era, that women were not physically capable of running 26.2 miles and that the distance was unsafe for them. Gibb had trained seriously and wanted to run the race, but she had no way to register.

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On race morning, Gibb hid in some bushes near the start line in Hopkinton, then joined the field once the gun went off. She ran the course without an official number and was not timed through the normal chip-free checkpoints. Her finish time is widely reported as about 3:21, based on the accounts that have been published since, though official timing records from that year do not list her.

Factors That Shaped Women’s Entry into Boston

Gibb’s run did not change the rules right away. Several factors combined over the following years to open the race to women.

  • Kathrine Switzer’s 1967 entry. The following year, Kathrine Switzer registered using only her initials, K.V. Switzer, and ran the race with a number. Her run drew media attention and a physical confrontation with a race official, which put the question of women’s participation in the public eye.
  • Growing women’s running in the late 1960s and 1970s. More women were running road races and clubs, which increased pressure on organizers to offer official entry.
  • Rule changes in 1972. The Boston Athletic Association officially allowed women to enter the race that year, and women have run the race officially ever since.
  • Later recognition of early runners. Gibb and other early female competitors received formal acknowledgment in later decades, which corrected the historical record.

If you want the broader history of women in distance racing, our guide to Who Was the First Female Marathon Runner? History and Key Facts covers the global timeline, including events outside Boston.

How to Research Early Boston Marathon History

Because the early records are incomplete, researching this topic takes some care. Sources sometimes disagree on times, starting positions, and dates. A practical approach looks like this:

  1. Start with the Boston Athletic Association’s own race history pages, which document rule changes and official results.
  2. Check contemporary newspaper coverage from 1966 and 1967 for first-hand accounts.
  3. Read the memoirs and interviews given by Gibb and Switzer, noting where their accounts agree.
  4. Compare any claimed times against the official results table for that year, and label any unofficial figure as such.
  5. Be cautious with social media posts that repeat a time without a source.

For readers who want a quick overview of the wider “first woman” question, First Female to Run the Boston Marathon? answers the common follow-up questions in shorter form.

Why the Distinction Matters

Calling Gibb the first female Boston Marathon runner is accurate, but the word “unofficial” matters. Her run was real and was documented by witnesses and later by the race itself. It was not recorded as an official entry, and the rules at the time excluded women. Keeping both facts in view gives a more accurate picture than either a simple celebration or a simple dismissal.

Switzer’s 1967 run is often described as the first official female entry in practice, since she was registered and given a number, even though she was later described as a challenge to the rules rather than a sanctioned participant. The 1972 rule change made women’s entry formal.

Who was the first woman to finish the Boston Marathon?

Roberta “Bobbi” Gibb is generally credited with the first unofficial female finish in 1966. Official women’s results began after the 1972 rule change.

Was Kathrine Switzer the first woman to run Boston?

No. Gibb ran in 1966, and Switzer ran in 1967 with a registered number. Switzer is known for being the first woman to run with an official-looking bib, which drew wide attention.

When did women become officially allowed in the Boston Marathon?

The Boston Athletic Association officially opened the race to women in 1972.

What was the first female winning time in Boston?

Women’s official winning times are recorded in the race’s results archive from 1972 onward. Check the official Boston Athletic Association records for exact figures, since they are updated by the race.

Can I find Gibb’s exact finish time?

Her time is widely reported as about 3:21, but it is not in the official results because she was unregistered. Treat that figure as an estimate from later accounts.

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Lauren Holland

About Lauren Holland

Lauren Holland is part of our editorial team and reviews and edits our marathon & half-marathon guides, checking product details against manufacturer specifications and owner feedback.