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| Name: | Koch, Isabel Aletta |
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| Club: | Green Mile Athletics Club | ||
| Residence: | Pretoria | ||
| Year of birth: | 1968 | (Cat. german: W55) | |
| Date of birth: | 23.11.1968 | (Cat. internat.: W55) | |
| Nationality: | RSA  |
South Africa | |
| RunnerID: | 302654 | ||
40 search results (39 Events, 2654 km). (More)
| 2026 | 1 Event, 50 km (More) | ||||
|---|---|---|---|---|---|
| 25.04.2026 | Loskop Ultra Marathon 50km (RSA) | 50km | |||
| 5:47:37 h | Koch, Isabel Aletta | Green Mile AC | Overall: 1524 | F: 294 | Cat W55: 15 |
| 2025 | 3 Events, 188 km (More) | ||||
| 08.06.2025 | Comrades Marathon - Down Run (RSA) | 90km | |||
| 11:40:01 h | Koch, Isabel Aletta | Green Mile AC | Overall: 15197 | F: 2761 | Cat W55: 78 |
| 04.05.2025 | KIA False Bay 50km (RSA) | 50km | |||
| 5:48:28 h | Koch, Isabel Aletta | Green Mile AC | Overall: 801 | F: 247 | Cat W55: 13 |
| 22.03.2025 | Irene Running Festival 48K (RSA) | 48km | |||
| 5:49:30 h | Koch, Isabel Aletta | Overall: 1040 | F: 182 | Cat W55: 5 | |
| 2024 | 3 Events, 185 km (More) | ||||
| 09.06.2024 | Comrades Marathon - Up Run (RSA) | 87km | |||
| 11:47:55 h | Koch, Isabel Aletta | Green Mile AC | Overall: 15670 | F: 2892 | Cat W55: 106 |
| 20.04.2024 | Loskop Ultra Marathon 50km (RSA) | 50km | |||
| 5:57:32 h | Koch, Isabel Aletta | Green Mile AC | Overall: 1373 | F: 276 | Cat W55: 12 |
| 06.04.2024 | Irene Running Festival 48K (RSA) | 48km | |||
| 5:38:54 h | Koch, Isabel Aletta | Green Mile AC | Overall: 1082 | F: 197 | Cat W55: 9 |
| 2023 | 3 Events, 193 km (More) | ||||
| 11.06.2023 | Comrades Marathon - Down Run (RSA) | 87km | |||
| 11:47:19 h | Koch, Isabel Aletta | Green Mile AC | Overall: 14122 | F: 2761 | Cat W50: 228 |
| 06.05.2023 | Loskop Ultra Marathon 50km (RSA) | 50km | |||
| 5:54:16 h | Koch, Isabel Aletta | Green Mile AC | Overall: 657 | F: 254 | Cat W50: 27 |
| 15.04.2023 | Two Oceans Marathon - 50km Split (RSA) | 50km | |||
| 5:59:54 h | Koch, Isabel Aletta | Green Mile AC | Overall: 6804 | F: 1767 | Cat W50: 155 |
| 15.04.2023 | Two Oceans Marathon (RSA) | 56km | |||
| 6:41:31 h | Koch, Isabel Aletta | Green Mile AC | Overall: 6804 | F: 1764 | Cat W50: 155 |
| 2022 | 2 Events, 155 km (More) | ||||
| 19.11.2022 | SkyRun Lite 65 Km (RSA) | 65km | |||
| 17:00:48 h | Koch, Isabel Aletta | Overall: 71 | F: 17 | Cat W50: 1 | |
| 28.08.2022 | Comrades Marathon - Down Run (RSA) | 90km | |||
| 10:57:39 h | Koch, Isabel Aletta | Green Mile AC | Overall: 7618 | F: 1326 | Cat W50: 110 |
| 2019 | 1 Event, 87 km (More) | ||||
| 09.06.2019 | Comrades Marathon - Up Run (RSA) | 87km | |||
| 11:20:23 h | Koch, Isabel Aletta | Green Mile Athletics Club | Overall: 11283 | F: 1762 | Cat W50: 151 |
| 2018 | 3 Events, 188 km (More) | ||||
| 10.06.2018 | Comrades Marathon - Down Run (RSA) | 90km | |||
| 11:25:26 h | Koch, Isabel Aletta | Green Mile Athletics Club | Overall: 12717 | F: 2280 | Cat W45: 366 |
| 21.04.2018 | Loskop Ultra Marathon 50km (RSA) | 50km | |||
| 5:40:44 h | Koch, Isabel Aletta | Green Mile Athletics Club | Overall: 2241 | F: 510 | Cat W45: 81 |
| 08.04.2018 | Modern Athlete Irene Ultra (RSA) | 48km | |||
| 5:28:16 h | Koch, Isabel Aletta | Green Mile Athletics Club | Overall: 1601 | F: 283 | Cat W45: 49 |
| 2017 | 2 Events, 135 km (More) | ||||
| 04.06.2017 | Comrades Marathon - Up Run (RSA) | 87km | |||
| 10:55:37 h | Koch, Isabel Aletta | Green Mile Athletics Club | Overall: 8588 | F: 1313 | Cat W45: 216 |
| 02.04.2017 | Modern Athlete Irene Ultra (RSA) | 48km | |||
| 5:44:27 h | Koch, Isabel Aletta | Green Mile Athletics Club | Overall: 2022 | F: 396 | Cat W45: 66 |
| 2016 | 3 Events, 187 km (More) | ||||
| 29.05.2016 | Comrades Marathon - Down Run (RSA) | 89km | |||
| 10:10:12 h | Koch, Isabel Aletta | Green Mile Athletics Club | Overall: 5757 | F: 742 | Cat W45: 115 |
| 16.04.2016 | Loskop Ultra Marathon 50km (RSA) | 50km | |||
| 5:14:55 h | Koch, Isabel Aletta | Green Mile Athletics | Overall: 1454 | F: 275 | Cat W45: 41 |
| 10.04.2016 | Modern Athlete Irene Ultra (RSA) | 48km | |||
| 5:24:25 h | Koch, Isabel Aletta | Irene Road Running Club | Overall: 908 | F: 139 | Cat W45: 20 |
| 2015 | 3 Events, 187 km (More) | ||||
| 31.05.2015 | Comrades Marathon - Up Run (RSA) | 87km | |||
| 10:55:00 h | Koch, Isabel Aletta | Irene Athletics Club | Overall: 7430 | F: 1164 | Cat W45: 187 |
| 18.04.2015 | Loskop Ultra Marathon 50km (RSA) | 50km | |||
| 5:15:59 h | Koch, Isabel Aletta | Irnene Atheletics Club | Overall: 1657 | F: 276 | Cat W45: 32 |
| 21.03.2015 | Om Die Dam 50km (RSA) | 50km | |||
| 6:21:08 h | Koch, Isabel Aletta | Irene Road Running Club | Overall: 2504 | F: 525 | Cat W45: 79 |
| 2014 | 4 Events, 241 km (More) | ||||
| 12.07.2014 | Rhodes 52 km Trail Run (RSA) | 52km | |||
| 8:15:35 h | Koch, Isabel Aletta | Overall: 170 | F: 37 | Cat W45: 6 | |
| 01.06.2014 | Comrades Marathon - Down Run (RSA) | 89km | |||
| 10:48:28 h | Koch, Isabel Aletta | Irene Road Running Club | Overall: 7004 | F: 1100 | Cat W45: 180 |
| 12.04.2014 | Loskop Ultra Marathon 50km (RSA) | 50km | |||
| 5:25:23 h | Koch, Isabel Aletta | Irene Road Runn | Overall: 1635 | F: 295 | Cat W45: 47 |
| 15.03.2014 | Om Die Dam 50km (RSA) | 50km | |||
| 5:59:18 h | Koch, Isabel Aletta | Irene Road Running Club | Overall: 2238 | F: 395 | Cat W45: 73 |
| 2013 | 3 Events, 189 km (More) | ||||
| 06.07.2013 | Rhodes 52 km Trail Run (RSA) | 52km | |||
| 8:16:10 h | Koch, Isabel Aletta | Overall: 189 | F: 45 | Cat W40: 14 | |
| 02.06.2013 | Comrades Marathon - Up Run (RSA) | 87km | |||
| 11:26:15 h | Koch, Isabel Aletta | Irene Road Running Club | Overall: 7043 | F: 1149 | Cat W40: 270 |
| 20.04.2013 | Loskop Ultra Marathon 50km (RSA) | 50km | |||
| 5:27:18 h | Koch, Isabel Aletta | Overall: 1831 | F: 368 | Cat W40: 73 | |
| 2012 | 1 Event, 89 km (More) | ||||
| 03.06.2012 | Comrades Marathon - Down Run (RSA) | 89km | |||
| 10:19:22 h | Koch, Isabel Aletta | Irene Road Running Club | Overall: 5305 | F: 665 | Cat W40: 161 |
| 2011 | 1 Event, 87 km (More) | ||||
| 29.05.2011 | Comrades Marathon - Up Run (RSA) | 87km | |||
| 11:34:40 h | Koch, Isabel Aletta | Irene Road Running Club | Overall: 8989 | F: 1644 | Cat W40: 382 |
| 2010 | 1 Event, 89 km (More) | ||||
| 30.05.2010 | Comrades Marathon - Down Run (RSA) | 89km | |||
| 10:19:01 h | Koch, Isabel Aletta | Irene Road Running Club | Overall: 6046 | F: 912 | Cat W40: 230 |
| 2009 | 1 Event, 89 km (More) | ||||
| 24.05.2009 | Comrades Marathon - Down Run (RSA) | 89km | |||
| 10:53:55 h | Koch, Isabel Aletta | Irene Road Running Club | Overall: 6832 | F: 966 | Cat W40: 243 |
| 2008 | 1 Event, 87 km (More) | ||||
| 15.06.2008 | Comrades Marathon - Up Run (RSA) | 87km | |||
| 11:34:16 h | Koch, Isabel Aletta | Irene Road Running Club | Overall: 7067 | F: 1046 | Cat W35: 223 |
| 2007 | 1 Event, 89 km (More) | ||||
| 17.06.2007 | Comrades Marathon - Down Run (RSA) | 89km | |||
| 10:54:18 h | Koch, Isabel Aletta | Irene Road Running Club | Overall: 6827 | F: 1002 | Cat W35: 227 |
| 2005 | 2 Events, 139 km (More) | ||||
| 16.06.2005 | Comrades Marathon - Down Run (RSA) | 89km | |||
| 10:55:55 h | Koch, Isabel Aletta | Irene Road Running Club | Overall: 8546 | F: 1306 | Cat W35: 338 |
| 23.04.2005 | Loskop Ultra Marathon 50km (RSA) | 50km | |||
| 5:21:09 h | Koch, Isabel Aletta | Irene Road Running Club | Overall: 2899 | F: 561 | Cat W35: 133 |
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 | 2026 | 2025 | 2024 | 2023 | 2022 | 2019 | 2018 | 2017 | 2016 | 2015 | 2014 | 2013 | 2012 | 2011 | 2010 | 2009 | 2008 | 2007 | 2005 | |
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| 50km | 5:59:18 |
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5:59:54
(3629/1916) |
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6:21:08
(4371/2467) |
5:59:18
(3370/1777) |
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Comparison table
Comparison of performances in races with multiple participations
| 2026 | 2025 | 2024 | 2023 | 2022 | 2019 | 2018 | 2017 | 2016 | 2015 | 2014 | 2013 | 2012 | 2011 | 2010 | 2009 | 2008 | 2007 | 2005 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Comrades Marathon - Down Run | 18 | 11:40:01 | 11:47:55 | 11:47:19 | 10:57:39 | 11:20:23 | 11:25:26 | 10:55:37 | 10:10:12 | 10:55:00 | 10:48:28 | 11:26:15 | 10:19:22 | 11:34:40 | 10:19:01 | 10:53:55 | 11:34:16 | 10:54:18 | 10:55:55 | |
| Loskop Ultra Marathon 50km | 9 | 5:47:37 | 5:57:32 | 5:54:16 | 5:40:44 | 5:14:55 | 5:15:59 | 5:25:23 | 5:27:18 | 5:21:09 | ||||||||||
| Modern Athlete Irene Ultra | 5 | 5:49:30 | 5:38:54 | 5:28:16 | 5:44:27 | 5:24:25 | ||||||||||||||
| Rhodes 52 km Trail Run | 2 | 8:15:35 | 8:16:10 | |||||||||||||||||
| Om Die Dam 50km | 2 | 6:21:08 | 5:59:18 |