Louis Koszewski has 4 recorded races from OAK BROOK, Illinois, US.
| Date | Race | Distance | Time | Overall |
|---|---|---|---|---|
| 2025-08-23 | 2025 Chicago Triathlon Olympic | Ultra Marathon | 3:29:28 | 1974 |
| 2024-08-24 | 2024 Chicago Triathlon International | Ultra Marathon | 3:41:45 | 2019 |
| 2023-08-27 | 2023 Chicago Triathlon International | Ultra Marathon | 2:40:46 | 1732 |
| 2022-08-28 | 2022 Chicago Triathlon International - Individual | Ultra Marathon | 3:13:10 | 1305 |