Heewon Koh has 4 recorded races from Monte Sereno, CA, KR.
| Date | Race | Distance | Time | Overall |
|---|---|---|---|---|
| 2025-10-05 | 2025 Rock 'n' Roll San Jose Half Marathon | Half Marathon | 1:53:08 | 1050 |
| 2024-10-06 | 2024 Rock 'n' Roll San Jose Half Marathon | Half Marathon | 1:50:45 | 787 |
| 2023-09-30 | 2023 Rock 'n' Roll San Jose Half Marathon | Half Marathon | 1:55:53 | 1419 |
| 2022-10-09 | 2022 Rock 'n' Roll San Jose Half Marathon | Half Marathon | 2:00:03 | 1341 |