Kastor won Chicago in 2005, and she set the American record of 2:19:36 in winning London the following spring. Since Kastor turned 40 in February 2013, her fastest marathon is 2:33:18, run to place 11th at New York City in November 2014. Last September, she set the world masters half marathon record of 1:09:36.
Kastor's fellow Olympic medalist, and her predecessor as the American record holder, Joan Benoit Samuelson, will also run Chicago on an anniversary of her victory there. Samuelson won the 1985 edition in 2:21:21, which was the U.S. record until Kastor ran 2:21:16 at London in 2003. Samuelson, 58, said she wants to run within half an hour of her 1985 time at Chicago this year. She ran 2:54:03 at Boston in April.
More From Runner's World
Scott is a veteran running, fitness, and health journalist who has held senior editorial positions at Runner’s World and Running Times. Much of his writing translates sport science research and elite best practices into practical guidance for everyday athletes. He is the author or coauthor of several running books, including Running Is My Therapy, Advanced Marathoning, and Meb for Mortals. Scott has also written about running for Slate, The Atlantic, the Washington Post, and other members of the sedentary media. His lifetime running odometer is past 110,000 miles, but he’s as much in love as ever.