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| Name: | Leff, Jonathan |
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| Club: | |||
| Residence: | Boulder, CO | ||
| Year of birth: | 1985 | (Cat. german: M40) | |
| Date of birth: | 18.02.1985 | (Cat. internat.: M40) | |
| Nationality: | USA  |
United States | |
| RunnerID: | 2070668 | ||
4 search results (4 Events, 295.467 km). (More)
| 2025 | 1 Event, 100 km (More) | ||||
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| 26.-27.07.2025 | Never Summer 100k (USA) | 100km | |||
| 19:06:14 h | Leff, Jonathan | *Boulder, CO | Overall: 72 | M: 59 | Cat M40: 8 |
| 2024 | 2 Events, 130.467 km (More) | ||||
| 14.09.2024 | Run Rabbit Run 50 Mile Endurance Run (USA) | 50mi | |||
| 10:29:11 h | Leff, Jonathan | *Boulder, CO | Overall: 20 | M: 15 | Cat M35: 2 |
| 13.04.2024 | Desert Rats Trail Running Festival 50 Km (USA) | 50km | |||
| 5:52:13 h | Leff, Jonathan | Overall: 83 | M: 64 | Cat M35: 13 | |
| 2023 | 1 Event, 65 km (More) | ||||
| 02.09.2023 | Grand Traverse Mountain Run (USA) | 65km | |||
| 8:27:22 h | Leff, Jonathan | *Boulder, CO | Overall: 46 | M: 34 | Cat M35: 7 |
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 |
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