Jeff Vander Maas has 2 recorded races from Grand Rapids, Michigan, US.
| Date | Race | Distance | Time | Overall |
|---|---|---|---|---|
| 2023-09-16 | 2023 Life Time Chequamegon MTB Festival presented by Trek Chequamegon 40 | Ultra Marathon | 3:31:43 | 576 |
| 2022-09-17 | 2022 Chequamegon MTB Festival Chequamegon 40 | Ultra Marathon | 3:12:51 | 400 |