Henry Kouwenhoven has 3 recorded races from Gibson Island, Maryland, US.
| Date | Race | Distance | Time | Overall |
|---|---|---|---|---|
| 2026-06-06 | 2026 Baltimore 10 Miler | 10 Mile | 1:34:07 | 671 |
| 2025-10-18 | Baltimore Running Festival Marathon | 4:42:41 | 1165 | |
| 2022-06-04 | Baltimore 10 Miler | 10 Mile | 1:24:37 | 368 |