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| Name: | Walker, Mark Harold |
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| Club: | Marathon Club Ireland, North Down AC, Athletics NI | ||
| Residence: | Bangor | ||
| Year of birth: | 1969 | (Cat. german: M55) | |
| Date of birth: | hidden | (Cat. internat.: M55) | |
| Nationality: | IRL  |
Ireland | |
| RunnerID: | 701054 | ||
23 search results (22 Events, 2629.292 km). (More)
| 2025 | 2 Events, 273 km (More) | ||||
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| 03.05.2025 | Anglo-Celtric Plate (ACP) 100km (GBR) | 100km | |||
| 8:06:50 h | Walker, Mark Harold | Overall: 6 | M: 6 | Cat M55: 1 | |
| 03.05.2025 | Mallory Park 100km (GBR) | 100km | |||
| 8:06:50 h | Walker, Mark Harold | Northern Ireland | Overall: 20 | M: 17 | Cat M55: 1 |
| 18.-19.04.2025 | Belfast 2 Dublin Ultra (GBR) | 173km | |||
| 16:42:15 h | Walker, Mark Harold | Overall: 1 | M: 1 | Cat M55: 1 | |
| 2023 | 3 Events, 417.828 km (More) | ||||
| 26.-28.08.2023 | Last One Standing Florence Court (GBR) | 39h | |||
| 254.828 km | Walker, Mark Harold | Overall: 2 | M: 2 | Cat M50: 1 | |
| 02.04.2023 | ACP NI and British 100K Championships 100km (GBR) | 100km | |||
| 7:28:04 h | Walker, Mark Harold | NI Athletics | Overall: 17 | M: 16 | Cat M50: 1 |
| 04.03.2023 | Shanes Castle Ultra (GBR) | 63km | |||
| 4:28:02 h | Walker, Mark Harold | Marathon Club Ireland | Overall: 1 | M: 1 | Cat M50: 1 |
| 2022 | 3 Events, 316.238 km (More) | ||||
| 16.07.2022 | The Grey Abbey Endurance Challenge 6h (GBR) | 6h | |||
| 68.400 km | Walker, Mark Harold | Athletics NI | Overall: 1 | M: 1 | Cat M50: 1 |
| 18.-19.06.2022 | Belfast 100 Mile Road Race (GBR) | 100mi | |||
| 14:48:22 h | Walker, Mark Harold | Overall: 2 | M: 2 | Cat M50: 1 | |
| 29.05.2022 | Loop the Lough Ultra (GBR) | 54mi | |||
| 6:43:49 h | Walker, Mark Harold | Overall: 1 | M: 1 | Cat M50: 1 | |
| 2021 | 1 Event, 82.57 km (More) | ||||
| 16.-17.10.2021 | Belfast 24-Hour Int. Road Race (GBR) | 24h | |||
| 82.570 km | Walker, Mark Harold | Overall: 84 | M: 54 | Cat M50: 11 | |
| 2020 | 3 Events, 391.594 km (More) | ||||
| 17.-19.10.2020 | Backyard Ultra World Team Championships - Ireland (IRL) | 42h | |||
| 228.004 km | Walker, Mark Harold | Overall: 4 | M: 4 | Cat M50: 2 | |
| 07.03.2020 | Shanes Castle Ultra (GBR) | 63km | |||
| 4:50:52 h | Walker, Mark Harold | Overall: 1 | M: 1 | Cat M50: 1 | |
| 15.02.2020 | Last One Standing Castleward (GBR) | 41h | |||
| 100.590 km | Walker, Mark Harold | Overall: 37 | M: 28 | Cat M50: 4 | |
| 2019 | 2 Events, 115.966 km (More) | ||||
| 11.08.2019 | Ultimate Ultra Challenge Road 50km (GBR) | 50km | |||
| 4:18:40 h | Walker, Mark Harold | Overall: 1 | M: 1 | Cat M45: 1 | |
| 22.-23.06.2019 | Energia 24-Hour Race (GBR) | 24h | |||
| 65.966 km | Walker, Mark Harold | MCI | Overall: 209 | M: 142 | Cat M45: 26 |
| 2018 | 3 Events, 458.478 km (More) | ||||
| 23.-24.06.2018 | Energia 24-Hour Race (GBR) | 24h | |||
| 226.478 km | Walker, Mark Harold | Overall: 4 | M: 4 | Cat M45: 3 | |
| 30.-31.03.2018 | Belfast 2 Dublin Ultra (GBR) | 169km | |||
| 17:50:00 h | Walker, Mark Harold | Overall: 3 | M: 3 | Cat M45: 2 | |
| 10.03.2018 | Shanes Castle Ultra (GBR) | 63km | |||
| 5:16:09 h | Walker, Mark Harold | Overall: 2 | M: 2 | Cat M45: 1 | |
| 2017 | 3 Events, 352.163 km (More) | ||||
| 25.11.2017 | Loop the Lough Ultra (GBR) | 54mi | |||
| 7:26:26 h | Walker, Mark Harold | Marathon Club Ireland | Overall: 1 | M: 1 | Cat M45: 1 |
| 01.-02.07.2017 | Energia 24-Hour Race (GBR) | 24h | |||
| 215.259 km | Walker, Mark Harold | North Down AC | Overall: 6 | M: 6 | Cat M45: 2 |
| 10.06.2017 | Portumna 50km Ultramarathon (IRL) | 50km | |||
| 3:30:40 h | Walker, Mark Harold | Overall: 1 | M: 1 | Cat M45: 1 | |
| 2016 | 2 Events, 221.455 km (More) | ||||
| 25.06.2016 | Energia 12-Hour Race (GBR) | 12h | |||
| 121.455 km | Walker, Mark Harold | Overall: 1 | M: 1 | Cat M45: 1 | |
| 11.06.2016 | Portumna 100km Ultramarathon (IRL) | 100km | |||
| 9:11:24 h | Walker, Mark Harold | Overall: 4 | M: 4 | Cat M45: 2 | |
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 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | |
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| 50km | 3:30:40 |
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3:30:40
(277/8) |
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| 100km | 7:28:04 |
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7:28:04
(113/4) |
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9:11:24
(777/4) |
| 100mi | 14:48:22 |
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14:48:22
(59/2) |
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| 12h | 121.455 |
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121.455
(141/4) |
| 24h | 226.478 |
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82.570
(2326/32) |
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65.966
(3829/65) |
226.478
(85/4) |
215.259
(177/7) |
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Comparison table
Comparison of performances in races with multiple participations
| 2025 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | ||
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| Energia 24-Hour Race | 4 | 82.570 | 65.966 | 226.478 | 215.259 | |||||
| Shanes Castle Ultra | 3 | 4:28:02 | 4:50:52 | 5:16:09 | ||||||
| Loop the Lough Ultra | 2 | 6:43:49 | 7:26:26 | |||||||
| Belfast 2 Dublin Ultra | 2 | 16:42:15 | 17:50:00 |