| Jon Ahern's efforts: | From | Age | Date | Finish Time |
|---|---|---|---|---|
| The Bear 100 2018 | Colorado, US | 48 | Friday, September 28, 2018 | DNF |
| 2015 Golden Gate Dirty 30 (50K) | 45 | Saturday, May 30, 2015 | Not yet started |
| Jon Ahern's efforts: | From | Age | Date | Finish Time |
|---|---|---|---|---|
| The Bear 100 2018 | Colorado, US | 48 | Friday, September 28, 2018 | DNF |
| 2015 Golden Gate Dirty 30 (50K) | 45 | Saturday, May 30, 2015 | Not yet started |