page_title: 2017 Boston Marathon
hierarchical_section_title: 2017 Boston Marathon
caption_attribution_description: English: Approximately Mile 12 of the 2017 Boston Marathon.
context_page_description: The 2017 Boston Marathon was the 121st running of the Boston Athletic Association's mass-participation marathon. It took place on Monday, April 17. Geoffrey Kirui won the men's race in 2:09:37 and Edna Kiplagat won the women's race in 2:21:52.
  Kathrine Switzer at age 70 ran the marathon under bib number 261, the same number she had worn 50 years previously in 1967, finishing in 4:44:31. That number was then retired from all future Boston Marathons. Women were not allowed to run marathons until 1972, but she registered under the name K. V. Switzer.
context_section_description: The 2017 Boston Marathon was the 121st running of the Boston Athletic Association's mass-participation marathon. It took place on Monday, April 17 (Patriots' Day in Massachusetts). Geoffrey Kirui won the men's race in 2:09:37 and Edna Kiplagat won the women's race in 2:21:52.
  Kathrine Switzer at age 70 ran the marathon under bib number 261, the same number she had worn 50 years previously in 1967, finishing in 4:44:31. That number was then retired from all future Boston Marathons. Women were not allowed to run marathons until 1972, but she registered under the name K. V. Switzer.
caption: Geoffrey Kirui and Edna Kiplagat
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