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| Name: | Zientko, John |
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| Club: | |||
| Residence: | Mundelein, IL | ||
| Year of birth: | 1998 | (Cat. german: M20) | |
| Date of birth: | 00.00.0000 | (Cat. internat.: M23) | |
| Nationality: | USA  |
United States | |
| RunnerID: | 760740 | ||
24 search results (24 Events, 1476.363 km). (More)
| 2025 | 3 Events, 150 km (More) | ||||
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| 12.07.2025 | Dances with Dirt - Devil's Lake 50K Ultra (USA) | 50km | |||
| 8:03:35 h | Zientko, John | Overall: 112 | M: 78 | Cat M23: 17 | |
| 21.06.2025 | Catamount Ultra Marathon (USA) | 50km | |||
| 5:44:18 h | Zientko, John | *Lebanon, NH | Overall: 51 | M: 35 | Cat M23: 14 |
| 30.03.2025 | Sleeping Giant Trail Runs (USA) | 50km | |||
| 7:20:58 h | Zientko, John | Overall: 19 | M: 16 | Cat M23: 4 | |
| 2021 | 4 Events, 204.717 km (More) | ||||
| 05.06.2021 | Yankee Springs 50 km Trail Run (USA) | 50km | |||
| 6:13:53 h | Zientko, John | *Ypsalanti, MI | Overall: 23 | M: 19 | Cat MU23: 2 |
| 08.05.2021 | Island Time 6 Hour Race (USA) | 6h | |||
| 54.717 km | Zientko, John | Overall: 4 | M: 3 | Cat MU23: 1 | |
| 03.04.2021 | Fools 50K Trail Run (USA) | 50km | |||
| 6:18:52 h | Zientko, John | *Mundelein, IL | Overall: 24 | M: 19 | Cat MU23: 2 |
| 27.03.2021 | Chicago Lakefront Spring 50km Race (USA) | 50km | |||
| 5:56:40 h | Zientko, John | *Ypsilanti, MI | Overall: 44 | M: 30 | Cat MU23: 1 |
| 2019 | 4 Events, 200 km (More) | ||||
| 04.08.2019 | Badger Trail Races 50K (USA) | 50km | |||
| 6:05:28 h | Zientko, John | *Mundelein, IL | Overall: 26 | M: 8 | Cat MU23: 1 |
| 25.05.2019 | Bunk House Trail Runs (USA) | 50km | |||
| 5:15:32 h | Zientko, John | *IL | Overall: 2 | M: 2 | Cat MU23: 1 |
| 13.04.2019 | The Riley Trails 50k (USA) | 50km | |||
| 5:15:18 h | Zientko, John | *Mundelein, IL | Overall: 6 | M: 3 | Cat MU23: 1 |
| 30.03.2019 | Chicago Lakefront Spring 50km Race (USA) | 50km | |||
| 4:28:37 h | Zientko, John | *Mundelein, IL | Overall: 11 | M: 11 | Cat MU23: 1 |
| 2018 | 3 Events, 210.934 km (More) | ||||
| 17.08.2018 | Marquette Trail 50 Mile (USA) | 50mi | |||
| 13:59:58 h | Zientko, John | *Mundelein, IL | Overall: 61 | M: 46 | Cat MU23: 2 |
| 12.05.2018 | Ice Age Trail 50 Mile Run (USA) | 50mi | |||
| 9:47:50 h | Zientko, John | Overall: 97 | M: 83 | Cat MU23: 1 | |
| 14.04.2018 | Chicago Lakefront Spring 50km Race (USA) | 50km | |||
| 4:07:22 h | Zientko, John | *Mundelein, IL | Overall: 1 | M: 1 | Cat MU23: 1 |
| 2017 | 2 Events, 150.211 km (More) | ||||
| 05.11.2017 | tBunk Endurance Challenge 50 Km (USA) | 31.2mi | |||
| 4:18:49 h | Zientko, John | *IL | Overall: 1 | M: 1 | Cat MU23: 1 |
| 18.08.2017 | Marquette Trail 100 km (USA) | 100km | |||
| 18:49:54 h | Zientko, John | *Mundelein, IL | Overall: 24 | M: 22 | Cat MU23: 1 |
| 2016 | 6 Events, 399.567 km (More) | ||||
| 06.11.2016 | tBunk Endurance Challenge 50 Km (USA) | 31.2mi | |||
| 6:29:20 h | Zientko, John | *IL | Overall: 16 | M: 11 | Cat MU23: 2 |
| 15.10.2016 | Des Plaines River 50 Miles Trail Race (USA) | 50mi | |||
| 9:37:25 h | Zientko, John | *Plymouth, MN | Overall: 46 | M: 31 | Cat MU23: 1 |
| 16.07.2016 | Christmas in July 6 Hour Run (USA) | 6h | |||
| 57.955 km | Zientko, John | Overall: 3 | M: 2 | Cat MU23: 1 | |
| 09.07.2016 | Dances with Dirt - Devil's Lake 50M Ultra (USA) | 50mi | |||
| 11:05:13 h | Zientko, John | Overall: 28 | M: 23 | Cat MU23: 1 | |
| 14.05.2016 | Ice Age Trail 50 Mile Run (USA) | 50mi | |||
| 9:37:31 h | Zientko, John | Overall: 71 | M: 57 | Cat MU23: 1 | |
| 23.04.2016 | Earth Day 50k (USA) | 50km | |||
| 4:49:40 h | Zientko, John | *Mundelein, IL | Overall: 12 | M: 10 | Cat MU23: 1 |
| 2015 | 2 Events, 160.934 km (More) | ||||
| 17.10.2015 | Des Plaines River 50 Miles Trail Race (USA) | 50mi | |||
| 9:26:01 h | Zientko, John | *Mundelein, IL | Overall: 32 | M: 21 | Cat MU23: 1 |
| 11.07.2015 | Dances with Dirt - Devil's Lake 50M Ultra (USA) | 50mi | |||
| 12:54:28 h | Zientko, John | Overall: 51 | M: 40 | Cat MU23: 5 | |
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 | 2021 | 2019 | 2018 | 2017 | 2016 | 2015 | |
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| 50km | 4:07:22 |
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5:56:40
(2943/251) |
4:28:37
(3650/131) |
4:07:22
(1520/56) |
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| 6h | 57.955 |
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57.955
(1400/45) |
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Comparison table
Comparison of performances in races with multiple participations
| 2025 | 2021 | 2019 | 2018 | 2017 | 2016 | 2015 | ||
|---|---|---|---|---|---|---|---|---|
| Chicago Lakefront Spring 50km Race | 3 | 5:56:40 | 4:28:37 | 4:07:22 | ||||
| tBunk Endurance Challenge 50 Km | 2 | 4:18:49 | 6:29:20 | |||||
| Des Plaines River 50 Miles Trail Race | 2 | 9:37:25 | 9:26:01 | |||||
| Ice Age Trail 50 Mile Run | 2 | 9:47:50 | 9:37:31 | |||||
| Dances with Dirt - Devil's Lake 50M Ultra | 2 | 11:05:13 | 12:54:28 |