Stephan Koch has 6 recorded races from Cincinnati, Ohio, US.
| Date | Race | Distance | Time | Overall |
|---|---|---|---|---|
| 2026-04-19 | Athens Ohio Marathon | 2:58:09 | 26 | |
| 2025-04-13 | Schneider Electric Marathon de Paris 2025 — Schneider Electric Marathon de Paris | Marathon | 3:00:40 | 2143 |
| BMW Berlin Marathon 2025 | Marathon | 3:26:23 | 5808 | |
| BMW Berlin Marathon 2025 | Marathon | 3:58:07 | 12945 | |
| BMW Berlin Marathon 2024 | Marathon | 3:41:43 | 14175 |