Jonathan Marciniak has 4 recorded races from Chicago, Illinois, US.
| Date | Race | Distance | Time | Overall |
|---|---|---|---|---|
| 2026-05-17 | 2026 Life Time Chicago Spring Half Marathon & 5K | Half Marathon | 2:28:00 | 4505 |
| 2025-09-28 | 2025 Life Time Chicago Half Marathon + 5K | Half Marathon | 2:32:41 | 6183 |
| 2024-05-19 | 2024 Life Time Chicago Spring Half & 10K Half Marathon | Half Marathon | 2:23:56 | 3484 |
| 2023-05-21 | Life Time Chicago Spring Half & 10K Half Marathon | Half Marathon | 2:10:16 | 2433 |