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| Name: | O'Brien, Dan |
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| Club: | |||
| Residence: | Westford, MA | ||
| Year of birth: | 1986 | (Cat. german: M40) | |
| Date of birth: | 00.00.0000 | (Cat. internat.: M35) | |
| Nationality: | USA  |
United States | |
| RunnerID: | 2107633 | ||
4 search results (4 Events, 291.683 km). (More)
| 2025 | 3 Events, 162.936 km (More) | ||||
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| 01.-02.11.2025 | The Hamsterwheel 30 Hour Run (USA) | 30h | |||
| 57.936 km | O'Brien, Dan | Overall: 119 | M: 66 | Cat M35: 4 | |
| 26.07.2025 | Wakely Dam Ultra (USA) | 55km | |||
| 7:29:09 h | O'Brien, Dan | *Westford, PA | Overall: 20 | M: 20 | Cat M35: 1 |
| 27.04.2025 | Jack Bristol Lake Waramaug 50km Ultra Marathon (USA) | 50km | |||
| 4:53:47 h | O'Brien, Dan | *Westford, MA | Overall: 15 | M: 13 | Cat M35: 3 |
| 2023 | 1 Event, 128.747 km (More) | ||||
| 04.-05.11.2023 | The Hamsterwheel 30 Hour Run (USA) | 30h | |||
| 128.747 km | O'Brien, Dan | Overall: 34 | M: 23 | Cat M35: 6 | |
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 | 2023 | |
|---|---|---|---|
| 50km | 4:53:47 |
4:53:47
(5559/201) |
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Comparison table
Comparison of performances in races with multiple participations
| 2025 | 2023 | ||
|---|---|---|---|
| The Hamsterwheel 30 Hour Run | 2 | 57.936 | 128.747 |