Kate Tenforde (née O'Neill; born July 29, 1980) is an American long-distance runner from Milton, Massachusetts.

[3] Tenforde was a favorite at the 2008 U.S. Olympic Marathon Trials, but a knee injury forced her to drop out at mile 21.

[7] In 2009 Tenforde trained in Palo Alto, California, and was the first American finisher at the 2009 London Marathon, with a time of 2:34:48.

[11] From 2010 through 2015, Tenforde worked as a coach and product manager for runcoach to share her running expertise with recreational runners across the country.

In 2016, she launched Beantown Running and began offering private coaching services to runners of all levels.