| Tracy O'Brien's efforts: | From | Age | Date | Finish Time |
|---|---|---|---|---|
| 2025 High Lonesome 100 | Colorado, US | 38 | Friday, July 18, 2025 | 29:55:18.00 |
| 2022 High Lonesome 100 | Colorado, US | 35 | Friday, July 22, 2022 | 33:56:20.00 |
| Tracy O'Brien's efforts: | From | Age | Date | Finish Time |
|---|---|---|---|---|
| 2025 High Lonesome 100 | Colorado, US | 38 | Friday, July 18, 2025 | 29:55:18.00 |
| 2022 High Lonesome 100 | Colorado, US | 35 | Friday, July 22, 2022 | 33:56:20.00 |