| David Greenberg's efforts: | From | Age | Date | Finish Time |
|---|---|---|---|---|
| 2021 Silverton Ultra Dirty (60K) | Colorado, US | 56 | Saturday, August 7, 2021 | 12:51:52.00 |
| The Bear 100 2019 | Colorado, US | 54 | Friday, September 27, 2019 | DNF |
| 2018 Silverton Ultra Marathon (55K) | Colorado, US | 53 | Saturday, August 11, 2018 | 09:48:47.00 |
| 2017 Silverton Double Dirty 30 (55K) | Colorado, US | 52 | Saturday, September 23, 2017 | Not yet started |
| Hardrock 100 2008 | Colorado, US | 44 | Friday, July 11, 2008 | DNF |
| Hardrock 100 2006 | Colorado, US | 42 | Friday, July 14, 2006 | DNF |