Janet Cobby has 4 recorded races.
| Date | Race | Distance | Time | Overall |
|---|---|---|---|---|
| TCS London Marathon 2025 | Marathon | 4:36:56 | 29302 | |
| TCS London Marathon 2024 | Marathon | 3:59:00 | 20463 | |
| TCS London Marathon 2023 | Marathon | 4:15:12 | 22813 | |
| TCS London Marathon 2022 | Marathon | 4:03:46 | 13738 |