Gregory Grossbier has 2 recorded races from Wisconsin Rapids, Wisconsin, US.
| Date | Race | Distance | Time | Overall |
|---|---|---|---|---|
| 2023-09-16 | 2023 Life Time Chequamegon MTB Festival presented by Trek Chequamegon 40 | Ultra Marathon | 7:21:01 | 999999 |
| 2022-09-17 | 2022 Chequamegon MTB Festival Chequamegon 40 | Ultra Marathon | 6:30:12 | 1269 |