2017 Boston Marathon

{{Short description|121st edition of the Boston Marathon}}

{{Use mdy dates|date=April 2017}}

{{Infobox athletics competition

|competition = 2017 Boston Marathon

|image = 130px 150px

|caption = Geoffrey Kirui and Edna Kiplagat

|venue = Boston

|dates = April 17

|men = Geoffrey Kirui

|men_win_value =2:09:37

|women= Edna Kiplagat

|women_win_value = 2:21:52

|wheelchair_men = Marcel Hug

|wheelchair_men_win_value =1:18:04

|wheelchair_women = Manuela Schär

|wheelchair_women_win_value =1:28:17

|prev = 2016

|next = 2018

}}

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.{{cite web|url=http://www.cnn.com/2017/04/17/us/boston-marathon-kathrine-switzer-trnd/|title=1st woman to officially run Boston Marathon does it again, 50 years later|author=Emanuella Grinberg|website=cnn.com}}