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| Name: | Koski, Jess |
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| Club: | |||
| Residence: | Two Harbors, MN | ||
| Year of birth: | 1954 | (Cat. german: M70) | |
| Date of birth: | 00.00.0000 | (Cat. internat.: M70) | |
| Nationality: | USA  |
United States | |
| RunnerID: | 135465 | ||
6 search results (6 Events, 612.227 km). (More)
| 2025 | 1 Event, 129.425 km (More) | ||||
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| 28.-29.12.2025 | Across the Years, 24h (USA) | 24h | |||
| 129.425 km | Koski, Jess | *Hovland, MN | Overall: 10 | M: 6 | Cat M70: 1 |
| 2023 | 1 Event, 160.934 km (More) | ||||
| 31.12.2023-03.01.2024 | Across The Years, 100mi (USA) | 100mi | |||
| 33:50:28 h | Koski, Jess | *Hovland, MN | Overall: 39 | M: 26 | Cat M65: 4 |
| 2021 | 1 Event, 80.467 km (More) | ||||
| 13.-14.11.2021 | Tunnel Hill 50 Mile Race (USA) | 50mi | |||
| 11:13:27 h | Koski, Jess | *Hovland, MN | Overall: 173 | M: 110 | Cat M65: 2 |
| 2005 | 1 Event, 80.467 km (More) | ||||
| 10.09.2005 | Superior Fall Trail Races 50 Mile (USA) | 50mi | |||
| 9:49:19 h | Koski, Jess | *Two Harbors, MN | Overall: 3 | M: 3 | Cat M50: 1 |
| 1980 | 1 Event, 80.467 km (More) | ||||
| 26.10.1980 | Michigan 50 miles (USA) | 50mi | |||
| 5:59:20 h | Koski, Jess | *Minn | Overall: 2 | M: 2 | Cat M23: 1 |
| 1979 | 1 Event, 80.467 km (More) | ||||
| 23.09.1979 | Michigan 50 miles (USA) | 50mi | |||
| 6:47:28 h | Koski, Jess | Overall: 16 | M: 15 | Cat M23: 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 | 2023 | 2021 | 2005 | 1980 | 1979 | |
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| 50mi | 11:13:27 |
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11:13:27
(765/319) |
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| 100mi | 33:50:28 |
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33:50:28
(905/317) |
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| 24h | 129.425 |
129.425
(2073/233) |
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Comparison table
Comparison of performances in races with multiple participations
| 2025 | 2023 | 2021 | 2005 | 1980 | 1979 | ||
|---|---|---|---|---|---|---|---|
| Michigan 50 miles | 2 | 5:59:20 | 6:47:28 |