Deena Kastor Breaks U.S. Masters Record at Chicago Marathon

Deena Kastor ran 2:27:47 to break the U.S. masters marathon record by almost a minute at the Chicago Marathon on Sunday. She finished seventh woman overall and was the top American.Kastor’s time broke Colleen De Reuck’s U.S. masters record of 2:28:40, which has stood since 2005.Kastor went into the race targeting the masters record—she knew she needed to average 5:39 per mile—and she was faster than that pace throughout, passing halfway in 1:14:03.