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| Name: | Fox, Isaac |
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| Club: | |||
| Residence: | Houston, TX | ||
| Year of birth: | 1975 | (Cat. german: M50) | |
| Date of birth: | 04.10.1975 | (Cat. internat.: M50) | |
| Nationality: | USA  |
United States | |
| RunnerID: | 764828 | ||
44 search results (39 Events, 3342.622 km). (More)
| 2025 | 4 Events, 347.13 km (More) | ||||
|---|---|---|---|---|---|
| 30.12.2025-01.01.2026 | Snowdrop Ultra 55 Hour Race (USA) | 55h | |||
| 166.663 km | Fox, Isaac | *Houston, TX | Overall: 40 | M: 27 | Cat M50: 4 |
| 30.12.2025-01.01.2026 | Snowdrop Ultra 55 Hour Race - 50km Split (USA) | 50km | |||
| 5:38:55 h | Fox, Isaac | Overall: 6 | M: 4 | Cat M50: 2 | |
| 30.12.2025-01.01.2026 | Snowdrop Ultra 55 Hour Race - 50mi Split (USA) | 50mi | |||
| 10:56:56 h | Fox, Isaac | Overall: 12 | M: 9 | Cat M50: 3 | |
| 30.12.2025-01.01.2026 | Snowdrop Ultra 55 Hour Race - 100km Split (USA) | 100km | |||
| 18:28:04 h | Fox, Isaac | Overall: 26 | M: 19 | Cat M50: 4 | |
| 30.12.2025-01.01.2026 | Snowdrop Ultra 55 Hour Race - 100mi Split (USA) | 100mi | |||
| 32:38:30 h | Fox, Isaac | Overall: 23 | M: 17 | Cat M50: 3 | |
| 25.-26.10.2025 | Cactus Rose 50 Mile (USA) | 50mi | |||
| 16:41:14 h | Fox, Isaac | Overall: 9 | M: 7 | Cat M50: 1 | |
| 28.09.2025 | Sawatch Ascent 50km Race (USA) | 50km | |||
| 10:04:31 h | Fox, Isaac | *Houston, TX | Overall: 162 | M: 94 | Cat M45: 12 |
| 27.09.2025 | West Line Winder 50 km Race (USA) | 50km | |||
| 8:04:06 h | Fox, Isaac | *Houston, TX | Overall: 180 | M: 104 | Cat M45: 8 |
| 2024 | 2 Events, 200 km (More) | ||||
| 26.-27.10.2024 | Javelina Jundred 100 km Endurance Run (USA) | 100km | |||
| 18:43:40 h | Fox, Isaac | *Houston, TX | Overall: 191 | M: 89 | Cat M45: 17 |
| 13.01.2024 | Bandera 100 km Endurance Run (USA) | 100km | |||
| 19:11:48 h | Fox, Isaac | *Houston, TX | Overall: 286 | M: 229 | Cat M45: 32 |
| 2023 | 1 Event, 84.329 km (More) | ||||
| 29.04.2023 | Pandora's Box of Rox 50 Mile (USA) | 52.4mi | |||
| 11:58:03 h | Fox, Isaac | *Houston, TX | Overall: 7 | M: 6 | Cat M45: 2 |
| 2022 | 1 Event, 56 km (More) | ||||
| 21.05.2022 | Possums Revenge 56 km Race (USA) | 56km | |||
| 7:56:50 h | Fox, Isaac | *Houston, TX | Overall: 19 | M: 15 | Cat M45: 2 |
| 2021 | 6 Events, 468.526 km (More) | ||||
| 28.-29.08.2021 | Capt'n Karl's Trail Series - Reveille Peak Ranch (USA) | 60km | |||
| 9:06:55 h | Fox, Isaac | *Houston, TX | Overall: 11 | M: 11 | Cat M45: 3 |
| 08.-09.08.2021 | Capt'n Karl's Trail Series - Muleshoe Bend (USA) | 60km | |||
| 10:17:49 h | Fox, Isaac | *Houston, TX | Overall: 24 | M: 20 | Cat M45: 5 |
| 07.-08.08.2021 | Capt'n Karl's Trail Series - Colorado Bend (USA) | 60km | |||
| 9:45:01 h | Fox, Isaac | *Houston, TX | Overall: 16 | M: 14 | Cat M45: 4 |
| 27.-28.06.2021 | Capt'n Karl's Trail Series - Pedernales Falls (USA) | 60km | |||
| 9:04:37 h | Fox, Isaac | *Houston, TX | Overall: 27 | M: 24 | Cat M45: 5 |
| 12.-14.03.2021 | J&J Race and Trail Running Reunion 42 Mile Race (USA) | 42mi | |||
| 9:58:44 h | Fox, Isaac | Overall: 6 | M: 6 | Cat M45: 2 | |
| 06.-07.02.2021 | Rocky Raccoon 100 Mile Trail Run (USA) | 100mi | |||
| 27:37:14 h | Fox, Isaac | Overall: 185 | M: 153 | Cat M45: 28 | |
| 2020 | 2 Events, 200 km (More) | ||||
| 05.12.2020 | Tinajas Ultra 100 Km (USA) | 100km | |||
| 19:47:45 h | Fox, Isaac | Overall: 11 | M: 11 | Cat M45: 2 | |
| 01.-02.02.2020 | Rocky Raccoon 100 Km Trail Run (USA) | 100km | |||
| 12:29:25 h | Fox, Isaac | Overall: 13 | M: 10 | Cat M40: 4 | |
| 2019 | 5 Events, 517.596 km (More) | ||||
| 30.12.2019-01.01.2020 | Snowdrop Ultra 55 Hour Race (USA) | 55h | |||
| 246.662 km | Fox, Isaac | *Houston, TX | Overall: 7 | M: 5 | Cat M40: 1 |
| 07.-08.12.2019 | Brazos Bend 100 - 50 Mile (USA) | 50mi | |||
| 8:57:40 h | Fox, Isaac | *Houston, TX | Overall: 22 | M: 15 | Cat M40: 3 |
| 26.-27.10.2019 | Cactus Rose 50 Mile (USA) | 50mi | |||
| 12:00:44 h | Fox, Isaac | Overall: 9 | M: 8 | Cat M40: 2 | |
| 28.09.2019 | J&J Race and Trail Running Reunion 50 Km Race (USA) | 50km | |||
| 8:44:59 h | Fox, Isaac | Overall: 5 | M: 4 | Cat M40: 2 | |
| 24.-25.08.2019 | Capt'n Karl's Trail Series - Reveille Peak Ranch (USA) | 60km | |||
| 9:02:37 h | Fox, Isaac | Overall: 13 | M: 11 | Cat M40: 4 | |
| 2018 | 6 Events, 518.428 km (More) | ||||
| 30.12.2018-01.01.2019 | Snowdrop Ultra 55 Hour Race (USA) | 55h | |||
| 188.293 km | Fox, Isaac | *Houston, TX | Overall: 25 | M: 15 | Cat M40: 2 |
| 15.12.2018 | Houston Running Festival 50 km Ultra (USA) | 50km | |||
| 5:35:44 h | Fox, Isaac | *Houston, TX | Overall: 10 | M: 7 | Cat M40: 2 |
| 08.-09.12.2018 | Brazos Bend 100 - 50 Mile (USA) | 50mi | |||
| 10:27:52 h | Fox, Isaac | *Houston, TX | Overall: 40 | M: 29 | Cat M40: 9 |
| 29.09.2018 | J&J Race and Trail Running Reunion 50 Km Race (USA) | 50km | |||
| 8:39:30 h | Fox, Isaac | Overall: 19 | M: 12 | Cat M40: 4 | |
| 24.-25.02.2018 | Jackalope Jam 24 Hour Race (USA) | 24h | |||
| 69.201 km | Fox, Isaac | *Houston, TX | Overall: 24 | M: 12 | Cat M40: 4 |
| 10.02.2018 | Rocky 50 Mile Trail Run (USA) | 50mi | |||
| 12:15:11 h | Fox, Isaac | Overall: 67 | M: 45 | Cat M40: 10 | |
| 2017 | 5 Events, 391.401 km (More) | ||||
| 30.12.2017-01.01.2018 | Snowdrop Ultra 55 Hour Race (USA) | 55h | |||
| 160.934 km | Fox, Isaac | Overall: 70 | M: 20 | Cat M40: 2 | |
| 09.-10.12.2017 | Brazos Bend 100 - 50 Mile (USA) | 50mi | |||
| 12:29:09 h | Fox, Isaac | *Houston, TX | Overall: 112 | M: 68 | Cat M40: 12 |
| 18.11.2017 | Wild Hare 50 km Race (USA) | 50km | |||
| 7:17:50 h | Fox, Isaac | Overall: 47 | M: 31 | Cat M40: 4 | |
| 30.09.2017 | J&J Race and Trail Running Reunion 50 Km Race (USA) | 50km | |||
| 8:38:25 h | Fox, Isaac | Overall: 23 | M: 21 | Cat M40: 5 | |
| 09.09.2017 | Mission Tejas Trail Run (USA) | 50K | |||
| 7:19:12 h | Fox, Isaac | *Houston, TX | Overall: 30 | M: 23 | Cat M40: 3 |
| 2016 | 7 Events, 559.212 km (More) | ||||
| 30.12.2016-01.01.2017 | Snowdrop Ultra 55 Hour Race - 100mi Split (USA) | 100mi | |||
| 39:57:10 h | Fox, Isaac | Overall: 47 | M: 22 | Cat M40: 3 | |
| 30.12.2016-01.01.2017 | Snowdrop Ultra 55 Hour Race (USA) | 55h | |||
| 161.030 km | Fox, Isaac | Overall: 56 | M: 10 | Cat M40: 1 | |
| 10.-11.12.2016 | Brazos Bend 100 - 50 Mile (USA) | 50mi | |||
| 11:58:00 h | Fox, Isaac | *Houston, TX | Overall: 93 | M: 48 | Cat M40: 10 |
| 12.-13.11.2016 | Jackalope Jam 24 Hour Race (USA) | 24h | |||
| 77.248 km | Fox, Isaac | *Houston, TX | Overall: 32 | M: 19 | Cat M40: 5 |
| 24.09.2016 | J&J Race and Trail Running Reunion 50 Km Race (USA) | 50km | |||
| 8:43:45 h | Fox, Isaac | Overall: 21 | M: 15 | Cat M40: 4 | |
| 27.-28.08.2016 | Capt'n Karl's Trail Series - Reveille Peak Ranch (USA) | 60km | |||
| 10:48:05 h | Fox, Isaac | Overall: 41 | M: 35 | Cat M40: 6 | |
| 13.02.2016 | Rocky 50 Mile Trail Run (USA) | 50mi | |||
| 12:28:57 h | Fox, Isaac | *Houston, TX | Overall: 121 | M: 88 | Cat M40: 16 |
| 09.01.2016 | Bandera 50 km Ultratrail (USA) | 50km | |||
| 7:40:28 h | Fox, Isaac | Overall: 119 | M: 96 | Cat M40: 17 | |
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 | |
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| 100mi | 39:57:10 |
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39:57:10
(674/226) |
Comparison table
Comparison of performances in races with multiple participations
| 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Snowdrop Ultra 55 Hour Race | 5 | 166.663 | 246.662 | 188.293 | 160.934 | 161.030 | |||||
| J&J Race and Trail Running Reunion 50 Km Race | 4 | 8:44:59 | 8:39:30 | 8:38:25 | 8:43:45 | ||||||
| Brazos Bend 100 - 50 Mile | 4 | 8:57:40 | 10:27:52 | 12:29:09 | 11:58:00 | ||||||
| Capt'n Karl's Trail Series - Reveille Peak Ranch | 3 | 9:06:55 | 9:02:37 | 10:48:05 | |||||||
| Jackalope Jam 24 Hour Race | 2 | 69.201 | 77.248 | ||||||||
| Cactus Rose 50 Mile | 2 | 16:41:14 | 12:00:44 | ||||||||
| Rocky 50 Mile Trail Run | 2 | 12:15:11 | 12:28:57 |