| Marc Witkes's efforts: | From | Age | Date | Finish Time |
|---|---|---|---|---|
| Hardrock 100 2001 | Colorado, US | 35 | Friday, July 13, 2001 | 45:21:42.00 |
| Hardrock 100 1998 | Colorado, US | 31 | Friday, July 10, 1998 | DNF |
| Marc Witkes's efforts: | From | Age | Date | Finish Time |
|---|---|---|---|---|
| Hardrock 100 2001 | Colorado, US | 35 | Friday, July 13, 2001 | 45:21:42.00 |
| Hardrock 100 1998 | Colorado, US | 31 | Friday, July 10, 1998 | DNF |