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CHICAGO, ILLINOIS – OCTOBER 12: Conner Mantz of the United States celebrates breaking an American marathon record with a time of 2:04:43 during the 2025 Chicago Marathon on October 12, 2025 in Chicago, Illinois. (Photo by Geoff Stellfox\/Getty Images)<\/p>\n
Getty Images<\/p>\n
Clocking the seventh-fastest marathon of all-time<\/a>, Ugandan Jacob Kiplimo won the 48th annual Bank of America Chicago Marathon on Sunday in a time of 2 hours, 2 minutes and 23 seconds. <\/p>\n Three places later, former Brigham Young University star Conner Mantz followed, breaking a 23-year-old American record with a time of 2:04:43. <\/p>\n Last recorded by Khalid Khannouchi at the 2002 London Marathon, the 28-year-old Mantz drilled down on the final miles in Chicago, improving upon his sixth-place finish in 2023 in 2:07:47. He made the switch to the distance in 2022, running his first 26.2-mile race that same year in Chicago.<\/p>\n \u201cYou run 2:05:08 in Boston and then in your next marathon everyone is going to expect you to go after the American record,\u201d Mantz told LetsRun afterward<\/a>.<\/p>\n With seven marathons under his belt heading into Chicago, including an eighth-place finish at the 2024 Paris Olympics, the Utah resident knew the all-time mark was well within reach. <\/p>\n CHICAGO, ILLINOIS – OCTOBER 12: Conner Mantz of the United States celebrates breaking an American marathon record with a time of 2:04:43 on October 12, 2025 in Chicago, Illinois. (Photo by Geoff Stellfox\/Getty Images)<\/p>\n Getty ImagesWhat Led To Conner Mantz\u2019s Record Day<\/p>\n In March, Mantz clocked a time of 2:05:08 at the Boston Marathon, issuing one of the fastest marathons in U.S. history. Only one other performance in the annals of American running (Ryan Hall\u2019s 2:04:58<\/a> from Boston in 2011) had ever surpassed it \u2013 though neither mark was records-eligible, since Boston is net downhill. <\/p>\n By Sunday, Mantz<\/a> chased after the milestone. While he was on pace at the half marathon mark in 1:02:19, he nearly panicked at the start of the race when the pace went out in 4:30 \u2013 \u201cI was like, \u2018Oh crap, I just blew my chance.\u2019\u201d But Mantz laid down critical miles of 4:52 at 23, 4:47 at 24 and 5:05 at 25, setting up his final run-time. <\/p>\n \u201cWhen I came through (at 1:02), I knew sub-2:04 wasn\u2019t going to happen,\u201d Mantz said. \u201cBut I was OK with that.\u201d <\/p>\n On Sunday, he was among 11 American finishers over the first 26 places. <\/p>\n Wesley Kiptoo was the second U.S. athlete across the line in 2:09:02, while three former BYU runners were also in the mix: Aidan Troutner was 18th in 2:10:23; Canadian Rory Linkletter<\/a>, sporting an epic mullet, came up just 36 seconds short of Canada\u2019s national record, securing a time of 2:06:49; and Casey Clinger was 26th in 2:16:05 in his first marathon.<\/p>\n Galen Rupp, the 39-year-old American star who owned the second-best U.S. performance before Sunday\u2019s record fell, was 16th in 2:09:41.<\/p>\n How The Women Performed On Sunday In Chicago<\/p>\n Ethiopian Geji Fesya claimed the women\u2019s title in 2:14:57, following by her countrywoman Megertu Alemu in 2:17:18.<\/p>\n The top American in the field was Natosha Rogers, who ran a new personal best time of 2:23:28 over 26.2 miles. Dakota Popehn followed over a minute later in 2:24:20.<\/p>\n