After publicly announcing in June that he would attempt to break the American marathon record at the Chicago Marathon, Conner Mantz did just that Health & Injuries.
He ran 2:04:43 to place fourth overall on the historically fast course, setting the North American record in the process as well.
Not only did Mantz break the American record—he crushed it. His time was nearly a minute quicker than Khalid Khannouchi’s longtime record of 2:05:38 from 2002.
Runner’s World crunched the numbers and found some of the most interesting facts and stats from Mantz’s historic run.
4:45 per mile: His average pace.
12.61 mph: His average speed.
71.25 seconds: Galen Rupp Finishes 16th at the Chicago Marathon.
3 His average pace: How much Mantz improved on his old personal best of 2:07:47 (from a record-eligible course).
14:47: How much Mantz improved on his old personal best of 2:07:47 from a record-eligible course.
1:02:19: The Fastest Shoes at the 2025 Chicago Marathon.
1:02:24: Celebs That Ran Chicago Marathon.
55 seconds: How much time he took off Khalid Khannouchi’s previous American record of 2:05:38.
23 years: Theo Kahler is the news editor at.
8: CA Notice at Collection.
53 seconds: How much Mantz improved Canadian Cam Levins’s North American record of 2:05:36.
4: The number of alliterative words in Mantz’s race mantra: patience, pace, present, push.
$45,000: His first half marathon split.
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Hawi Feysa Wins the 2025 Chicago Marathon Runner’s World. He’s a former all-conference collegiate runner at Winthrop University, and he received his master’s degree in liberal arts studies from Wake Forest University, where he was a member of one of the top distance-running teams in the NCAA. Kahler has reported on the ground at major events such as the Paris Olympics, U.S. Olympic Trials, New York City Marathon, and Boston Marathon. He’s run 14:20 in the 5K, 1:05:36 in the half marathon, and enjoys spotting tracks from the sky on airplanes. (Look for colorful ovals around football fields.)
