| John Kirk's efforts: | From | Age | Date | Finish Time |
|---|---|---|---|---|
| The Bear 100 2017 | Colorado, US | 41 | Friday, September 22, 2017 | 28:09:11.00 |
| Quad Rock 2017 | Colorado, US | 41 | Saturday, May 13, 2017 | DNF |
| Never Summer 100k 2015 | CO | 39 | Saturday, July 25, 2015 | 16:01:05.00 |
| John Kirk's efforts: | From | Age | Date | Finish Time |
|---|---|---|---|---|
| The Bear 100 2017 | Colorado, US | 41 | Friday, September 22, 2017 | 28:09:11.00 |
| Quad Rock 2017 | Colorado, US | 41 | Saturday, May 13, 2017 | DNF |
| Never Summer 100k 2015 | CO | 39 | Saturday, July 25, 2015 | 16:01:05.00 |