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Conner Mantz Sets New American Marathon Record in Chicago

10/12/2025

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Summary

Story summary

Conner Mantz set a new American marathon record with 2:04:43 at the 2025 Chicago Marathon.
The time breaks Khalid Khannouchi's 23-year American record of 2:05:38.
Mantz finished fourth behind Jacob Kiplimo, who won in 2:02:23, and his run surpasses Ryan Hall's 2011 Boston mark of 2:04:58, though that record is ineligible.
Mantz plans to compete at the World Cross-Country Championships in January 2026.

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Story summary

Conner Mantz set a new American marathon record with 2:04:43 at the 2025 Chicago Marathon.
The time breaks Khalid Khannouchi's 23-year American record of 2:05:38.
Mantz finished fourth behind Jacob Kiplimo, who won in 2:02:23, and his run surpasses Ryan Hall's 2011 Boston mark of 2:04:58, though that record is ineligible.
Mantz plans to compete at the World Cross-Country Championships in January 2026.