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