Calum Macdonald has 8 recorded races from GB.
| Date | Race | Distance | Time | Overall |
|---|---|---|---|---|
| 2026-04-12 | Schneider Electric Marathon de Paris 2026 — Marathon de Paris | Marathon | 3:25:50 | 8091 |
| 2023-04-02 | Schneider Electric Marathon de Paris 2023 — Running 42.195km | Marathon | 4:27:33 | 37272 |
| TCS London Marathon 2026 | Marathon | 2:54:07 | 2110 | |
| TCS London Marathon 2025 | Marathon | 2:43:51 | 911 | |
| TCS London Marathon 2025 | Marathon | 3:55:34 | 16199 | |
| TCS London Marathon 2024 | Marathon | 4:27:34 | 29520 |