Dong Koo has 4 recorded races from SUNNYVALE, CA, US.
| Date | Race | Distance | Time | Overall |
|---|---|---|---|---|
| 2025-03-15 | 2025 Rock 'n' Roll Washington DC Half Marathon | Half Marathon | 1:59:16 | 3996 |
| 2024-10-06 | 2024 Rock 'n' Roll San Jose Half Marathon | Half Marathon | 2:01:00 | 1393 |
| 2023-09-30 | 2023 Rock 'n' Roll San Jose Half Marathon | Half Marathon | 1:53:36 | 1264 |
| 2023-06-04 | 2023 Rock 'n' Roll San Diego Half Marathon | Half Marathon | 2:06:15 | 4794 |