Ian Kumamoto has 4 recorded races from STREAMWOOD, Illinois, US.
| Date | Race | Distance | Time | Overall |
|---|---|---|---|---|
| 2025-08-23 | 2025 Chicago Triathlon Olympic | Ultra Marathon | 3:46:09 | 2257 |
| 2024-08-24 | 2024 Chicago Triathlon International | Ultra Marathon | 4:27:02 | 2374 |
| 2023-08-27 | 2023 Chicago Triathlon International | Ultra Marathon | 3:26:50 | 2538 |
| 2022-08-28 | 2022 Chicago Triathlon International - Individual | Ultra Marathon | 4:11:19 | 2312 |