About Kate O'Neill
Born 1980. Kate O'Neill is an American athletics competitor and marathon runner.
Kate Tenforde (née O'Neill; born July 29, 1980) is an American long-distance runner from Milton, Massachusetts. She represented the United States in the 2004 Summer Olympics, competing in the 10,000 metres.
Amateur career Tenforde ran cross country and track and field at Yale University, where she was a three-time NCAA runner-up in Cross Country, 5000 m (indoor), and 10,000 m (outdoor). O'Neill earned All-American honors in both Cross Country and Outdoor track. Her twin sister, Laura, was also an All-American at Yale.
Marathon Tenforde later turned her focus to longer distance events, with an emphasis on the marathon. She was coached by Terrence Mahon, who coaches notable American marathoners Deena Kastor, Ryan Hall, and Jen Rhines. She had a strong marathon debut at the Chicago Marathon, finishing third with a time of 2:36:15. In January 2008, she won the 2008 USA half-marathon championship (1:11:57) at the Aramco Houston Half-Marathon.
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.
In September 2014, Tenforde won the annual San Francisco J.P. Morgan Corporate Challenge 5k.
Personal Tenforde married former Stanford Cardinal runner Adam Tenforde on November 20, 2010.
Professional 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.
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Important facts
People in Kate O'Neill's life
Named in this biography and alive at the same time
Contemporaries
People whose lives overlapped Kate O'Neill's
Frequently asked questions
Who is Kate O'Neill?
American athletics competitor
When was Kate O'Neill born?
Kate O'Neill was born on 29 July 1980 in Milton.
What is Kate O'Neill's occupation?
Kate O'Neill is an athletics competitor and marathon runner.
What nationality is Kate O'Neill?
Kate O'Neill is American.
Sources & further reading
Cite this page
APA: Biography.guide. (2026). Kate O'Neill. https://biography.guide/kate-o-neill/
MLA: "Kate O'Neill." Biography.guide, https://biography.guide/kate-o-neill/.
Chicago: "Kate O'Neill." Biography.guide. https://biography.guide/kate-o-neill/.
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