| Ivy Lefebvre's efforts: | From | Age | Date | Finish Time |
|---|---|---|---|---|
| 2021 High Lonesome 100 | Colorado, US | 43 | Friday, July 30, 2021 | DNF |
| 2019 Silverton Ultra Marathon (55K) | Colorado, US | 41 | Saturday, August 3, 2019 | 10:48:22.00 |
| 2018 Silverton Ultra Marathon (100K) | Colorado, US | 40 | Saturday, August 11, 2018 | 15:18:27.00 |
| 2017 Silverton Double Dirty 30 (100K) | Colorado, US | 39 | Saturday, September 23, 2017 | DNF |
| 2017 High Lonesome 100 | 39 | Friday, July 28, 2017 | 32:00:19.00 | |
| 2016 Silverton Double Dirty 30 | Colorado, US | 38 | Saturday, September 24, 2016 | 16:27:38.00 |