In 2019, on the eve of the 40th anniversary of her first Boston Marathon win, Benoit and her daughter Abby ran together as they had done in previous marathons. Joan recorded a run time of 3:04:00, which was within 40 minutes of her original time which was a promise she had made prior to competing in this years edition of the Boston Marathon. This allowed her to win her age group (60-64) by nearly nine minutes, but falling short of the overall (3:01:30) fastest time by a woman over 60 in a marathon.