Mark Ondersma has 5 recorded races from Grand Rapids, Michigan, US.
| Date | Race | Distance | Time | Overall |
|---|---|---|---|---|
| 2024-07-26 | 2024 Life Time Leadville Stage Race Day 1 - 40 Miles | Ultra Marathon | 2:55:15 | 119 |
| 2024-07-26 | 2024 Life Time Leadville Stage Race Day 2 - 20 Miles | 2:10:38 | 62 | |
| 2024-07-26 | 2024 Life Time Leadville Stage Race Day 1 and 2 Totals | Ultra Marathon | 5:05:53 | 86 |
| 2024-07-26 | 2024 Life Time Leadville Stage Race Day 3 - 40 Miles | Ultra Marathon | 3:53:40 | 215 |
| 2024-07-26 | 2024 Life Time Leadville Stage Race Stage Race Series - 3 Day Totals | Ultra Marathon | 8:59:33 | 136 |