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| Name: | Nielson, Issy |
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| Club: | |||
| Residence: | Warwick, RI | ||
| Year of birth: | 1982 | (Cat. german: W40) | |
| Date of birth: | 22.08.1982 | (Cat. internat.: W40) | |
| Nationality: | USA  |
United States | |
| RunnerID: | 165874 | ||
47 search results (45 Events, 3678.602 km). (More)
| 2025 | 3 Events, 426.367 km (More) | ||||
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| 28.12.2025-01.01.2026 | Across The Years, 200mi (USA) | 200mi | |||
| 5d 07:43:23 h | Nielson, Issy | *El Mirage, AZ | Overall: 12 | F: 6 | Cat W40: 2 |
| 21.06.2025 | Flagstaff Extreme Big Pine 54K Trail Run (USA) | 54km | |||
| 7:59:45 h | Nielson, Issy | *El Mirage, AZ | Overall: 89 | F: 18 | Cat W40: 5 |
| 31.05.2025 | Hotfoot Hamster 6 Hour Run (USA) | 6h | |||
| 50.499 km | Nielson, Issy | *El Mirage, AZ | Overall: 9 | F: 4 | Cat W40: 2 |
| 2024 | 2 Events, 241.433 km (More) | ||||
| 28.12.2024-03.01.2025 | Across The Years, 100mi (USA) | 100mi | |||
| 5d 01:47:02 h | Nielson, Issy | *El Mirage, AZ | Overall: 100 | F: 47 | Cat W40: 7 |
| 01.06.2024 | Hotfoot Hamster 12 Hour Run (USA) | 12h | |||
| 80.499 km | Nielson, Issy | *El Mirage, AZ | Overall: 8 | F: 4 | Cat W40: 1 |
| 2023 | 3 Events, 260.934 km (More) | ||||
| 31.12.2023-03.01.2024 | Across The Years, 100mi (USA) | 100mi | |||
| 2d 02:56:29 h | Nielson, Issy | *El Mirage, AZ | Overall: 67 | F: 23 | Cat W40: 6 |
| 12.03.2023 | Prickly Pear 50 km Trail Run (USA) | 50km | |||
| 6:24:08 h | Nielson, Issy | *Waco, TX | Overall: 40 | F: 10 | Cat W40: 2 |
| 28.01.2023 | The Dallas Urban Ultra 50km (USA) | 50km | |||
| 5:04:34 h | Nielson, Issy | Overall: 2 | F: 1 | Cat W40: 1 | |
| 2022 | 5 Events, 419.775 km (More) | ||||
| 03.-04.12.2022 | Perpetual Motion 24 Hour Race (USA) | 24h | |||
| 104.317 km | Nielson, Issy | *Waco, TX | Overall: 6 | F: 4 | Cat W40: 1 |
| 08.10.2022 | Dana Peak Trail Run (USA) | 50km | |||
| 8:07:54 h | Nielson, Issy | *Waco, TX | Overall: 44 | F: 9 | Cat W40: 2 |
| 25.09.2022 | Hula Loop 6-Hour Sunday Series - Race 2 (USA) | 6h | |||
| 54.524 km | Nielson, Issy | *Waco, TX | Overall: 2 | F: 1 | Cat W40: 1 |
| 30.-31.07.2022 | Badger Trail Races by Ten Junk Miles Racing (USA) | 100mi | |||
| 30:50:42 h | Nielson, Issy | *Waco, TX | Overall: 57 | F: 20 | Cat W35: 3 |
| 12.02.2022 | Rocky 50 Km Trail Run (USA) | 50km | |||
| 6:09:09 h | Nielson, Issy | *Waco, TX | Overall: 59 | F: 12 | Cat W35: 4 |
| 2021 | 2 Events, 101.016 km (More) | ||||
| 28.-29.08.2021 | Hotfoot Hamster 6 Hour Run (USA) | 6h | |||
| 51.016 km | Nielson, Issy | *Phoenix, AZ | Overall: 9 | F: 5 | Cat W35: 3 |
| 06.02.2021 | Elephant Mountain 50 km (USA) | 50km | |||
| 6:29:54 h | Nielson, Issy | *Phoenix, AZ | Overall: 21 | F: 5 | Cat W35: 1 |
| 2020 | 1 Event, 50 km (More) | ||||
| 05.12.2020 | McDowell Mountain Frenzy 50 km (USA) | 50km | |||
| 6:02:46 h | Nielson, Issy | *Phoenix, AZ | Overall: 41 | F: 11 | Cat W35: 2 |
| 2018 | 2 Events, 100 km (More) | ||||
| 14.07.2018 | The Peak 50k Race (USA) | 50km | |||
| 6:48:33 h | Nielson, Issy | *Peoria, AZ | Overall: 10 | F: 1 | Cat W35: 1 |
| 23.03.2018 | Chili Peppers Series - Day 4 (USA) | 50km | |||
| 4:28:22 h | Nielson, Issy | *AZ | Overall: 1 | F: 1 | Cat W35: 1 |
| 2017 | 7 Events, 560.467 km (More) | ||||
| 02.12.2017 | McDowell Mountain Frenzy 50 Mile (USA) | 50mi | |||
| 9:50:31 h | Nielson, Issy | *Peoria, AZ | Overall: 10 | F: 2 | Cat W35: 2 |
| 02.-03.09.2017 | Jackrabbit Jubilee 12 Hour Run (USA) | 12h | |||
| 81.000 km | Nielson, Issy | *Peoria, AZ | Overall: 15 | F: 5 | Cat W35: 2 |
| 22.07.2017 | Harding Hustle 50K (USA) | 50km | |||
| 5:31:51 h | Nielson, Issy | *Peoria, AZ | Overall: 10 | F: 2 | Cat W23: 1 |
| 06.-07.05.2017 | Hotfoot Hamster 24 Hour Run (USA) | 24h | |||
| 161.000 km | Nielson, Issy | *Surprise, AZ | Overall: 2 | F: 1 | Cat W23: 1 |
| 08.04.2017 | Whiskey Basin 88 km Trail Run (USA) | 88km | |||
| 10:31:50 h | Nielson, Issy | *Surprise, AZ | Overall: 8 | F: 2 | Cat W23: 1 |
| 18.03.2017 | Mesquite Canyon 50 km (USA) | 50km | |||
| 6:41:16 h | Nielson, Issy | *Surprise, AZ | Overall: 11 | F: 5 | Cat W23: 3 |
| 07.01.2017 | San Tan Scramble 50K (USA) | 50km | |||
| 5:53:48 h | Nielson, Issy | *Surprise, AZ | Overall: 12 | F: 2 | Cat W23: 1 |
| 2016 | 2 Events, 100.694 km (More) | ||||
| 12.11.2016 | Colossal Vail 50 Km (USA) | 50km | |||
| 6:45:49 h | Nielson, Issy | *Surprise, AZ | Overall: 33 | F: 8 | Cat W23: 4 |
| 26.03.2016 | TARC To Hale and Back 6 Hours (USA) | 6h | |||
| 50.694 km | Nielson, Issy | *Warwick, RI | Overall: 14 | F: 1 | Cat W23: 1 |
| 2015 | 1 Event, 60.855 km (More) | ||||
| 08.11.2015 | Rhode Island 6 Hour Ultra (USA) | 6h | |||
| 60.855 km | Nielson, Issy | Overall: 7 | F: 3 | Cat W23: 3 | |
| 2014 | 3 Events, 295.746 km (More) | ||||
| 22.-23.03.2014 | New Jersey Ultra Festival 100 Mile Race (USA) | 100mi | |||
| 28:35:12 h | Nielson, Issy | Overall: 19 | F: 3 | Cat W23: 1 | |
| 08.02.2014 | Mid-Maryland Ultra 50k (USA) | 50km | |||
| 4:45:56 h | Nielson, Issy | *Warwick, RI | Overall: 10 | F: 3 | Cat W23: 2 |
| 19.01.2014 | The Batona 50 Mile (USA) | 52.7mi | |||
| 9:49:00 h | Nielson, Issy | *Warwick, RI | Overall: 2 | F: 1 | Cat W23: 1 |
| 2013 | 5 Events, 412.282 km (More) | ||||
| 10.11.2013 | Rhode Island 6 Hour Ultra - 50km Split (USA) | 50km | |||
| 4:56:49 h | Nielson, Issy | Overall: 16 | F: 4 | Cat W23: 4 | |
| 10.11.2013 | Rhode Island 6 Hour Ultra (USA) | 6h | |||
| 56.508 km | Nielson, Issy | Overall: 16 | F: 4 | Cat W23: 4 | |
| 17.-18.08.2013 | Beast of Burden Summer 100 Miler (USA) | 100mi | |||
| 20:56:16 h | Nielson, Issy | *Warwick, RI | Overall: 7 | F: 2 | Cat W23: 1 |
| 21.07.2013 | Cacapon 12 Hour Challenge (USA) | 12h | |||
| 64.373 km | Nielson, Issy | *Warwick, RI | Overall: 9 | F: 3 | Cat W23: 2 |
| 26.05.2013 | Trail Festival at Pineland Farms (USA) | 50mi | |||
| 8:59:43 h | Nielson, Issy | *Warwick, RI | Overall: 26 | F: 5 | Cat W23: 4 |
| 03.03.2013 | Caumsett Park 50K Lloyd Neck - Championships (USA) | 50km | |||
| 4:01:22 h | Nielson, Issy | *Warwick, RI | Overall: 17 | F: 6 | Cat W23: 4 |
| 2012 | 5 Events, 355.467 km (More) | ||||
| 10.12.2012 | Seth’s Fat Ass 50K (USA) | 50km | |||
| 4:29:30 h | Nielson, Issy | Overall: 10 | F: 3 | Cat W23: 1 | |
| 04.-05.08.2012 | Canadian Death Race (CAN) | 125km | |||
| 23:17:17 h | Nielson, Issy | *Warwick | Overall: 117 | F: 23 | Cat W23: 10 |
| 24.03.2012 | New Jersey Ultra Festival 50 Mile Race (USA) | 50mi | |||
| 7:48:29 h | Nielson, Issy | *Warwick, RI | Overall: 3 | F: 1 | Cat W23: 1 |
| 11.02.2012 | Mid-Maryland Ultra 50k (USA) | 50km | |||
| 4:46:17 h | Nielson, Issy | *Warwick, RI | Overall: 10 | F: 1 | Cat W23: 1 |
| 07.01.2012 | Fat Ass Race - GAC FA50 (USA) | 50km | |||
| 4:31:50 h | Nielson, Issy | Overall: 18 | F: 1 | Cat W23: 1 | |
| 2011 | 3 Events, 241.401 km (More) | ||||
| 19.11.2011 | JFK 50 Mile (USA) | 50mi | |||
| 8:20:29 h | Nielson, Issy | *Warwick, RI | Overall: 124 | F: 20 | Cat W23: 12 |
| 29.05.2011 | Trail Festival at Pineland Farms (USA) | 50mi | |||
| 9:42:02 h | Nielson, Issy | *Warwick, RI | Overall: 61 | F: 12 | Cat W23: 5 |
| 19.03.2011 | New Jersey Ultra Festival 50 Mile Race (USA) | 50mi | |||
| 8:18:20 h | Nielson, Issy | *Warwick, RI | Overall: 8 | F: 2 | Cat W23: 1 |
| 2010 | 1 Event, 52.165 km (More) | ||||
| 14.11.2010 | Rhode Island 6 Hour Ultra (USA) | 6h | |||
| 52.165 km | Nielson, Issy | *Warwick, RI | Overall: 43 | F: 8 | Cat W23: 5 |
| 14.11.2010 | Rhode Island 6 Hour Ultra - 50km Split (USA) | 50km | |||
| 5:41:12 h | Nielson, Issy | *Warwick, RI | Overall: 44 | F: 13 | Cat W23: 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 | 2022 | 2021 | 2020 | 2018 | 2017 | 2016 | 2015 | 2014 | 2013 | 2012 | 2011 | 2010 | |
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| 50km | 4:01:22 |
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4:01:22
(95/20) |
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5:41:12
(1971/277) |
| 100mi | 50:56:29 |
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121:47:02
(364/169) |
50:56:29
(377/168) |
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| 6h | 60.855 |
50.499
(784/37) |
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51.016
(496/35) |
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60.855
(197/14) |
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56.508
(294/30) |
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52.165
(376/28) |
| 12h | 81.000 |
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80.499
(654/120) |
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81.000
(577/87) |
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| 24h | 161.000 |
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104.317
(887/160) |
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161.000
(320/43) |
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Comparison table
Comparison of performances in races with multiple participations
| 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2018 | 2017 | 2016 | 2015 | 2014 | 2013 | 2012 | 2011 | 2010 | ||
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| Hotfoot Hamster 6 Hour Run | 3 | 50.499 | 80.499 | 51.016 | ||||||||||||
| Rhode Island 6 Hour Ultra | 3 | 60.855 | 56.508 | 52.165 | ||||||||||||
| Across The Years, 100mi | 2 | 121:47:02 | 50:56:29 | |||||||||||||
| Mid-Maryland Ultra 50k | 2 | 4:45:56 | 4:46:17 | |||||||||||||
| New Jersey Ultra Festival 50 Mile Race | 2 | 7:48:29 | 8:18:20 | |||||||||||||
| Trail Festival at Pineland Farms | 2 | 8:59:43 | 9:42:02 |