Gregory Flax has 4 recorded races from Manhattan, Kansas, US.
| Date | Race | Distance | Time | Overall |
|---|---|---|---|---|
| 2026-05-23 | 12th Annual Bill Snyder Highway Half & 5K Half Marathon | Half Marathon | 2:46:58 | 834 |
| 2025-05-24 | 11th Annual Bill Snyder Highway Half & 5K Half Marathon | Half Marathon | 2:57:58 | 761 |
| 2024-05-25 | 10th Annual Bill Snyder Highway Half & 5K Half Marathon | Half Marathon | 3:12:35 | 767 |
| 2023-05-27 | 9th Annual Bill Snyder Highway Half & 5K Half Marathon | Half Marathon | 3:00:29 | 661 |