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| Name: | Keirn, Peter |
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| Club: | |||
| Residence: | Syracuse, NY | ||
| Year of birth: | 1984 | (Cat. german: M40) | |
| Date of birth: | 25.02.1984 | (Cat. internat.: M40) | |
| Nationality: | USA  |
United States | |
| RunnerID: | 150037 | ||
39 search results (39 Events, 3188.854 km). (More)
| 2025 | 4 Events, 325.277 km (More) | ||||
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| 27.09.2025 | Parallel of Latitude 8 Hour Endurance Run (USA) | 8h | |||
| 49.970 km | Keirn, Peter | *Lacey, WA | Overall: 19 | M: 11 | Cat M40: 4 |
| 30.-31.08.2025 | Front Range Ultra Dayze 24h (USA) | 24h | |||
| 64.373 km | Keirn, Peter | *Lacey, WA | Overall: 12 | M: 4 | Cat M40: 1 |
| 28.-30.08.2025 | Front Range Ultra Dayze 100Miles (USA) | 100mi | |||
| 30:18:32 h | Keirn, Peter | *Lacey, WA | Overall: 9 | M: 7 | Cat M40: 2 |
| 05.07.2025 | Finger Lakes Fifties 50 km Run (USA) | 50km | |||
| 10:11:33 h | Keirn, Peter | *Lacey, WA | Overall: 77 | M: 53 | Cat M40: 9 |
| 2024 | 3 Events, 265.934 km (More) | ||||
| 12.10.2024 | Twin Peaks 50 km Trail Run (USA) | 50km | |||
| 8:47:04 h | Keirn, Peter | *Lacey, WA | Overall: 6 | M: 6 | Cat M40: 1 |
| 24.-25.08.2024 | Rio Grande 100 (USA) | 100mi | |||
| 35:17:54 h | Keirn, Peter | *Lacey, WA | Overall: 13 | M: 11 | Cat M40: 2 |
| 27.07.2024 | Grand Mesa 55 km Trail Race (USA) | 55km | |||
| 8:16:43 h | Keirn, Peter | *Lacey, WA | Overall: 39 | M: 30 | Cat M40: 3 |
| 2023 | 3 Events, 321.868 km (More) | ||||
| 23.09.2023 | That's No Moon Ultras 50M (USA) | 50mi | |||
| 12:09:42 h | Keirn, Peter | *Lacey, WA | Overall: 12 | M: 10 | Cat M35: 6 |
| 29.07.2023 | Pikes Peak Ultra 50 Mile (USA) | 50mi | |||
| 12:58:22 h | Keirn, Peter | *Lacey, WA | Overall: 25 | M: 18 | Cat M35: 1 |
| 10.-11.06.2023 | South Downs Way 100 Mile Race (GBR) | 100mi | |||
| 27:35:45 h | Keirn, Peter | *Lacey | Overall: 132 | M: 110 | Cat M35: 22 |
| 2022 | 4 Events, 346.401 km (More) | ||||
| 05.11.2022 | Mendon 50K Trail Run (USA) | 50km | |||
| 6:20:38 h | Keirn, Peter | *Lacey, WA | Overall: 20 | M: 18 | Cat M35: 4 |
| 20.-21.08.2022 | Leadville Trail 100 Mile (USA) | 100mi | |||
| 28:32:28 h | Keirn, Peter | *Lacey, WA | Overall: 200 | M: 164 | Cat M35: 38 |
| 30.07.2022 | Grand Mesa 55 km Trail Race (USA) | 55km | |||
| 8:40:47 h | Keirn, Peter | *Syracuse, NY | Overall: 21 | M: 14 | Cat M35: 6 |
| 02.04.2022 | Naked Prussian 50 Miler (USA) | 50mi | |||
| 11:09:41 h | Keirn, Peter | *Syracuse, NY | Overall: 40 | M: 38 | Cat M35: 9 |
| 2021 | 3 Events, 259.325 km (More) | ||||
| 06.11.2021 | Austin Rattler Run 50K (USA) | 50km | |||
| 4:32:08 h | Keirn, Peter | *Syracuse, NY | Overall: 39 | M: 35 | Cat M35: 8 |
| 31.07.-01.08.2021 | Mighty Mosquito 99 Mile Ultra Race (USA) | 99mi | |||
| 28:45:01 h | Keirn, Peter | *Syracuse, NY | Overall: 7 | M: 7 | Cat M35: 1 |
| 03.07.2021 | Finger Lakes Fifties 50 km Run (USA) | 50km | |||
| 7:43:00 h | Keirn, Peter | Overall: 60 | M: 31 | Cat M35: 8 | |
| 2020 | 2 Events, 239.792 km (More) | ||||
| 08.-09.08.2020 | Mighty Mosquito 99 Mile Ultra Race (USA) | 99mi | |||
| 27:24:04 h | Keirn, Peter | *Syracuse, NY | Overall: 9 | M: 8 | Cat M35: 3 |
| 18.07.2020 | Cayuga Trails 50 Mile Race (USA) | 50mi | |||
| 13:31:31 h | Keirn, Peter | *Syracuse, NY | Overall: 6 | M: 4 | Cat M35: 2 |
| 2019 | 1 Event, 50 km (More) | ||||
| 21.12.2019 | Seth’s Fat Ass 50K (USA) | 50km | |||
| 5:26:30 h | Keirn, Peter | *Syracuse, NY | Overall: 16 | M: 12 | Cat M35: 5 |
| 2018 | 4 Events, 273.587 km (More) | ||||
| 15.09.2018 | Shawangunk Ridge Trail 30-mile Run (USA) | 30mi | |||
| 8:42:00 h | Keirn, Peter | *Syracuse, NY | Overall: 19 | M: 15 | Cat M23: 6 |
| 21.07.2018 | Cayuga Trails 50 Mile Race (USA) | 50mi | |||
| 13:50:57 h | Keirn, Peter | *Syracuse, NY | Overall: 107 | M: 76 | Cat M23: 31 |
| 30.06.2018 | Finger Lakes Fifties 50 Mile Run (USA) | 50mi | |||
| 12:10:25 h | Keirn, Peter | *Syracuse, NY | Overall: 23 | M: 20 | Cat M23: 7 |
| 24.02.2018 | Mount Mitchell Challenge (USA) | 40mi | |||
| 7:40:25 h | Keirn, Peter | *Syracuse, NY | Overall: 85 | M: 76 | Cat M23: 25 |
| 2017 | 6 Events, 473.868 km (More) | ||||
| 16.12.2017 | Woodside Ramble 50K - Winter (USA) | 50km | |||
| 6:08:01 h | Keirn, Peter | *Syracuse, NY | Overall: 53 | M: 40 | Cat M23: 15 |
| 07.10.2017 | Can Lake 50 Mile Ultra (USA) | 50mi | |||
| 10:12:15 h | Keirn, Peter | *Syracuse, NY | Overall: 21 | M: 17 | Cat M23: 8 |
| 27.08.2017 | Green Lakes Endurance Run 50 km (USA) | 50km | |||
| 4:57:35 h | Keirn, Peter | *Syracuse, NY | Overall: 22 | M: 19 | Cat M23: 7 |
| 01.07.2017 | Finger Lakes Fifties 50 Mile Run (USA) | 50mi | |||
| 11:06:03 h | Keirn, Peter | *Syracuse, NY | Overall: 12 | M: 10 | Cat M23: 4 |
| 13.05.2017 | Thom B Trail Runs 52k (USA) | 52km | |||
| 6:25:09 h | Keirn, Peter | *Syracuse, NY | Overall: 16 | M: 11 | Cat M23: 5 |
| 04.-05.02.2017 | Rocky Raccoon 100 Mile Trail Run (USA) | 100mi | |||
| 23:29:30 h | Keirn, Peter | Overall: 77 | M: 67 | Cat M23: 12 | |
| 2016 | 3 Events, 210.934 km (More) | ||||
| 05.11.2016 | Mendon 50K Trail Run (USA) | 50km | |||
| 5:22:12 h | Keirn, Peter | *Syracuse, NY | Overall: 19 | M: 16 | Cat M23: 5 |
| 08.10.2016 | Can Lake 50 Mile Ultra (USA) | 50mi | |||
| 9:16:19 h | Keirn, Peter | *Syracuse, NY | Overall: 27 | M: 19 | Cat M23: 6 |
| 04.06.2016 | Cayuga Trails 50 Mile Race (USA) | 50mi | |||
| 12:49:56 h | Keirn, Peter | Overall: 128 | M: 96 | Cat M23: 32 | |
| 2015 | 2 Events, 160.934 km (More) | ||||
| 31.05.2015 | Cayuga Trails 50 Mile Race (USA) | 50mi | |||
| 14:21:37 h | Keirn, Peter | Overall: 163 | M: 128 | Cat M23: 46 | |
| 24.-25.01.2015 | Beast of Burden Winter 50 Miler (USA) | 50mi | |||
| 10:29:47 h | Keirn, Peter | *Syracuse, NY | Overall: 16 | M: 14 | Cat M23: 4 |
| 2014 | 2 Events, 130.467 km (More) | ||||
| 20.-21.09.2014 | Virgil Crest 50 Mile Ultra (USA) | 50mi | |||
| 15:01:00 h | Keirn, Peter | Overall: 82 | M: 70 | Cat M23: 35 | |
| 23.08.2014 | Green Lakes Endurance Run 50 km (USA) | 50km | |||
| 5:35:15 h | Keirn, Peter | *Syracuse, NY | Overall: 28 | M: 18 | Cat M23: 9 |
| 2013 | 1 Event, 80.467 km (More) | ||||
| 21.-22.09.2013 | Virgil Crest 50 Mile Ultra (USA) | 50mi | |||
| 14:41:00 h | Keirn, Peter | Overall: 93 | M: 85 | Cat M23: 40 | |
| 2010 | 1 Event, 50 km (More) | ||||
| 29.08.2010 | Green Lakes Endurance Run 50 km (USA) | 50km | |||
| 5:11:56 h | Keirn, Peter | *Syracuse, NY | Overall: 38 | M: 29 | Cat M23: 12 |
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 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | 2014 | 2013 | 2010 | |
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| 50km | 4:57:35 |
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4:57:35
(5808/242) |
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5:35:15
(9683/452) |
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5:11:56
(6165/514) |
| 50mi | 9:16:19 |
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10:12:15
(559/206) |
9:16:19
(236/134) |
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Comparison table
Comparison of performances in races with multiple participations
| 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | 2014 | 2013 | 2010 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cayuga Trails 50 Mile Race | 4 | 13:31:31 | 13:50:57 | 12:49:56 | 14:21:37 | ||||||||||
| Green Lakes Endurance Run 50 km | 3 | 4:57:35 | 5:35:15 | 5:11:56 | |||||||||||
| Mighty Mosquito 99 Mile Ultra Race | 2 | 28:45:01 | 27:24:04 | ||||||||||||
| Mendon 50K Trail Run | 2 | 6:20:38 | 5:22:12 | ||||||||||||
| Grand Mesa 55 km Trail Race | 2 | 8:16:43 | 8:40:47 | ||||||||||||
| Finger Lakes Fifties 50 km Run | 2 | 10:11:33 | 7:43:00 | ||||||||||||
| Finger Lakes Fifties 50 Mile Run | 2 | 12:10:25 | 11:06:03 | ||||||||||||
| Virgil Crest 50 Mile Ultra | 2 | 15:01:00 | 14:41:00 | ||||||||||||
| Can Lake 50 Mile Ultra | 2 | 10:12:15 | 9:16:19 |