Henrietta Mackinnon has 4 recorded races.
| Date | Race | Distance | Time | Overall |
|---|---|---|---|---|
| TCS London Marathon 2026 | Marathon | 3:48:45 | 15843 | |
| TCS London Marathon 2024 | Marathon | 3:37:31 | 12421 | |
| TCS London Marathon 2023 | Marathon | 3:32:21 | 9235 | |
| TCS London Marathon 2022 | Marathon | 3:27:36 | 5232 |