Antonin Kostal has 5 recorded races from Shoreview, Minnesota, US.
| Date | Race | Distance | Time | Overall |
|---|---|---|---|---|
| 2025-06-28 | Life Time Lutsen 99er presented by Visit Cook County Lutsen99er | Ultra Marathon | 9:34:24 | 477 |
| 2024-06-29 | 2024 Life Time Lutsen 99er Lutsen99er | Ultra Marathon | 6:49:38 | 317 |
| 2023-09-16 | 2023 Life Time Chequamegon MTB Festival presented by Trek Chequamegon 40 | Ultra Marathon | 2:57:39 | 165 |
| 2023-06-24 | 2023 Stages Cycling Lutsen 99er Lutsen69er | Ultra Marathon | 5:46:26 | 57 |
| 2022-09-17 | 2022 Chequamegon MTB Festival Chequamegon 40 | Ultra Marathon | 3:02:33 | 293 |