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JS
John Seplak
MaleIllinois2006–2026
9
Total Finishes
5
Different Races
1
States (2%)
1:37:52
PR (7:28/mi)
1:50:28
Average
+0:01:40
Slower (first to last)
Medal House
2026
Time Travel Half-Marathon (and 5k/10k) - Greater Chicago
1:46:58
#7 overall
2025
Time Travel Half-Marathon (and 5k/10k) - Greater Chicago
1:38:41
#6 overall
2025
Chicago 13.1
1:41:48
#1206 overall#1015 gender
2025
Life Time Chicago Half Marathon + 5K
1:47:39
#896 overall#700 gender
2025
Lincoln Memorial Half Marathon
2:06:39
#425 overall#276 gender
2023
Chicago Spring Half Marathon
1:37:52
#277 overall#240 gender
2022
Life Time Chicago Half Marathon + 5K
1:59:31
#2968 overall#1878 gender
2022
Chicago Spring Half Marathon
2:09:47
#2173 overall#1244 gender
2006
Life Time Chicago Half Marathon + 5K
1:45:18
#1101 overall#826 gender
Performance Timeline
Complete Race Log
| Year | Race | State | Time | Place |
|---|---|---|---|---|
| 2026 | Time Travel Half-Marathon (and 5k/10k) - Greater ChicagoShorewood | IL | 1:46:58 | #7 |
| 2025 | Time Travel Half-Marathon (and 5k/10k) - Greater ChicagoShorewood | IL | 1:38:41 | #6 |
| 2025 | Chicago 13.1Chicago | IL | 1:41:48 | #1206 |
| 2025 | Life Time Chicago Half Marathon + 5KChicago | IL | 1:47:39 | #896 |
| 2025 | Lincoln Memorial Half MarathonSpringfield | IL | 2:06:39 | #425 |
| 2023 | Chicago Spring Half MarathonChicago | IL | 1:37:52 | #277 |
| 2022 | Life Time Chicago Half Marathon + 5KChicago | IL | 1:59:31 | #2968 |
| 2022 | Chicago Spring Half MarathonChicago | IL | 2:09:47 | #2173 |
| 2006 | Life Time Chicago Half Marathon + 5KChicago | IL | 1:45:18 | #1101 |
States Raced
1 race 2 races 3-4 races 5+ races
State Breakdown
ILIllinois
9 races50-State Challenge
1/ 51 states + DC
50 states to go