| Jack O'Brien's efforts: | From | Age | Date | Finish Time |
|---|---|---|---|---|
| Blue Sky Marathon 2022 (Blue Sky) | Colorado, US | 34 | Saturday, October 15, 2022 | 04:10:49.00 |
| Blue Sky Marathon 2021 (Blue Sky) | Colorado, US | 33 | Saturday, October 16, 2021 | 04:27:51.00 |
| Jack O'Brien's efforts: | From | Age | Date | Finish Time |
|---|---|---|---|---|
| Blue Sky Marathon 2022 (Blue Sky) | Colorado, US | 34 | Saturday, October 15, 2022 | 04:10:49.00 |
| Blue Sky Marathon 2021 (Blue Sky) | Colorado, US | 33 | Saturday, October 16, 2021 | 04:27:51.00 |