Grant Mangan has 4 recorded races from Webster Groves, Missouri, US.
| Date | Race | Distance | Time | Overall |
|---|---|---|---|---|
| 2025-09-13 | 2025 Forest Park Cross Country Festival Open Race Open 5K | 5K | 19:40 | 18 |
| 2024-09-14 | 2024 Forest Park Cross Country Festival Open Race Open 5K | 5K | 06:14 | 21 |
| 2024-09-14 | 2024 Forest Park Cross Country Festival Open Race Open 5K | 5K | 06:14 | 21 |
| 2023-09-09 | 2023 Forest Park Cross Country Festival Open Race Open 5K | 5K | 19:41 | 18 |