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| Name: | O'Brien, Colin |
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| Residence: | Cape Elizabeth, ME | ||
| Year of birth: | 1985 | (Cat. german: M40) | |
| Date of birth: | 00.00.0000 | (Cat. internat.: M40) | |
| Nationality: | USA  |
United States | |
| RunnerID: | 1621654 | ||
9 search results (9 Events, 866.686 km). (More)
| 2025 | 2 Events, 482.803 km (More) | ||||
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| 18.10.2025 | Rogue Gorge 50 miles Race (USA) | 50mi | |||
| 10:03:37 h | O'Brien, Colin | *Duvall, WA | Overall: 41 | M: 32 | Cat M35: 8 |
| 05.-10.05.2025 | Cocodona 250 (USA) | 250mi | |||
| 4d 19:19:03 h | O'Brien, Colin | *Duvall, WA | Overall: 129 | M: 95 | Cat M35: 26 |
| 2024 | 1 Event, 50 km (More) | ||||
| 10.05.2024 | Tiger Claw (USA) | 50km | |||
| 6:45:14 h | O'Brien, Colin | *Duvall, WA | Overall: 25 | M: 18 | Cat M35: 5 |
| 2023 | 2 Events, 105.136 km (More) | ||||
| 05.08.2023 | Volcanic 50 (USA) | 50km | |||
| 7:28:35 h | O'Brien, Colin | *Duvall, WA | Overall: 28 | M: 22 | Cat M35: 7 |
| 27.05.2023 | Squak In The Dark Sport (USA) | 8h | |||
| 55.136 km | O'Brien, Colin | *Duvall, WA | Overall: 4 | M: 3 | Cat M35: 1 |
| 2022 | 2 Events, 128.747 km (More) | ||||
| 13.11.2022 | Bold Coast Bash 30 Mile Trail Race (USA) | 30mi | |||
| 6:44:15 h | O'Brien, Colin | *Cape Elizabeth, ME | Overall: 1 | M: 1 | Cat M35: 1 |
| 14.05.2022 | Peak Ultra 50 Mile Endurance Run (USA) | 50mi | |||
| 11:53:12 h | O'Brien, Colin | *Cape Elizabeth, ME | Overall: 4 | M: 3 | Cat M35: 1 |
| 2021 | 2 Events, 100 km (More) | ||||
| 11.09.2021 | Megunticook 50km Race (USA) | 50km | |||
| 6:20:56 h | O'Brien, Colin | *Cape Elizabeth, ME | Overall: 9 | M: 9 | Cat M35: 3 |
| 23.05.2021 | The Hootenanny 50km Trail Race (USA) | 50km | |||
| 6:39:45 h | O'Brien, Colin | *Bozeman, MT | Overall: 45 | M: 32 | Cat M35: 3 |
Personal bests
Your list of personal best performances only contains performances of races which can be included into rankings.
In brackets rank in yearly international/national rankings.
| PB | 2025 | 2024 | 2023 | 2022 | 2021 |
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