| David Greenberg's efforts: | From | Finish Time |
|---|---|---|
| The Bear 100 2019 | Colorado, US | DNF |
| 2018 Silverton Ultra Marathon (55K) | Colorado, US | 09:48:47 |
| Hardrock 100 2008 | Colorado, US | DNF |
| Hardrock 100 2006 | Colorado, US | DNF |
| 2017 Silverton Double Dirty 30 (55K) | Colorado, US | Not yet started |