Marah Koster has 3 recorded races from Clay Center, Kansas, US.
| Date | Race | Distance | Time | Overall |
|---|---|---|---|---|
| 2025-05-24 | 11th Annual Bill Snyder Highway Half & 5K | 5K | 28:26 | 208 |
| 2024-05-25 | 10th Annual Bill Snyder Highway Half & 5K | 5K | 28:29 | 180 |
| 2023-05-27 | 9th Annual Bill Snyder Highway Half & 5K | 5K | 31:34 | 228 |