| Mark Niebur's efforts: | From | Age | Date | Finish Time |
|---|---|---|---|---|
| 2017 Golden Gate Dirty 30 (50K) | Colorado, US | 31 | Saturday, June 3, 2017 | 07:34:36.56 |
| 2015 Golden Gate Dirty 30 (50K) | 29 | Saturday, May 30, 2015 | DNF |
| Mark Niebur's efforts: | From | Age | Date | Finish Time |
|---|---|---|---|---|
| 2017 Golden Gate Dirty 30 (50K) | Colorado, US | 31 | Saturday, June 3, 2017 | 07:34:36.56 |
| 2015 Golden Gate Dirty 30 (50K) | 29 | Saturday, May 30, 2015 | DNF |