Niamh Brennan has 4 recorded races from Boise, Idaho, US.
| Date | Race | Distance | Time | Overall |
|---|---|---|---|---|
| 2025-11-27 | 2025 Boise Turkey Day 5K Turkey Day 5K Boise | 5K | 26:43 | 779 |
| 2024-11-28 | 2024 Turkey Day 5K Boise | 5K | 34:19 | 1823 |
| TCS London Marathon 2026 | Marathon | 6:22:38 | 55473 | |
| BMW Berlin Marathon 2025 | Marathon | 4:29:37 | 7633 |