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JS
John Seifert
MaleIllinois1983–2025
19
Total Finishes
14
Different Races
9
States (18%)
1:42:04
PR (7:47/mi)
2:19:57
Average
+0:56:37
Slower (first to last)
Medal House
2018
Amita Health Bolingbrook St. Paddy's Half Marathon and 5K
2:21:46
#396 overall#228 gender
2018
Half Madness Half Marathon
2:23:16
#406 overall#250 gender
2017
Half Madness Half Marathon
2:00:10
#337 overall#235 gender
2017
Heritage Haul
2:04:03
#29 overall#16 gender
2017
Amita Health Bolingbrook St. Paddy's Half Marathon and 5K
2:14:49
#343 overall#207 gender
2016
Fargo Marathon Weekend
2:00:49
#1236 overall#713 gender
2013
Life Time Chicago Half Marathon + 5K
2:39:16
#8858 overall#4177 gender
2010
2026 Disneyland® Half Marathon Weekend presented by HONDA
2:08:26
#2729 overall#1659 gender
2009
2026 Disneyland® Half Marathon Weekend presented by HONDA
2:14:52
#3442 overall#2054 gender
2009
North Face Endurance Challenge
2:45:41
#504 overall#272 gender
2004
Rock 'n' Roll Chicago Half Marathon
2:04:37
#2097 overall#1424 gender
1983
DEXTER-ANN ARBOR RUN
1:57:17
#1301 overall#1134 gender
Performance Timeline
Complete Race Log
| Year | Race | State | Time | Place |
|---|---|---|---|---|
| 2025 | Chicago 13.1Chicago | IL | 2:24:17 | #6396 |
| 2025 | Baltimore Running FestivalBaltimore | MD | 2:47:41 | #3679 |
| 2025 | Staunton Rocks! Marathon and Half MarathonPine | CO | 2:53:54 | #74 |
| 2024 | Fargo Marathon WeekendFargo | ND | 3:09:21 | #2955 |
| 2021 | Frederick Running FestivalFrederick | MD | 1:42:04 | #95 |
| 2019 | Baltimore Running FestivalBaltimore | MD | 2:00:15 | #1550 |
| 2019 | Naperville Trails Half Marathon & 10KWheaton | IL | 2:08:42 | #284 |
| 2019 | Sly Fox Half Madness and 10KSt Charles | IL | 2:22:26 | #331 |
| 2018 | Amita Health Bolingbrook St. Paddy's Half Marathon and 5KBolingbrook | IL | 2:21:46 | #396 |
| 2018 | Half Madness Half MarathonBatavia | IL | 2:23:16 | #406 |
| 2017 | Half Madness Half MarathonBatavia | IL | 2:00:10 | #337 |
| 2017 | Heritage HaulSouth Holland | IL | 2:04:03 | #29 |
| 2017 | Amita Health Bolingbrook St. Paddy's Half Marathon and 5KBolingbrook | IL | 2:14:49 | #343 |
| 2016 | Fargo Marathon WeekendFargo | ND | 2:00:49 | #1236 |
| 2013 | Life Time Chicago Half Marathon + 5KChicago | IL | 2:39:16 | #8858 |
| 2010 | 2026 Disneyland® Half Marathon Weekend presented by HONDAAnaheim | CA | 2:08:26 | #2729 |
| 2009 | 2026 Disneyland® Half Marathon Weekend presented by HONDAAnaheim | CA | 2:14:52 | #3442 |
| 2009 | North Face Endurance ChallengeMadison | WI | 2:45:41 | #504 |
| 2004 | Rock 'n' Roll Chicago Half MarathonChicago | IL | 2:04:37 | #2097 |
| 1983 | DEXTER-ANN ARBOR RUNDexter | MI | 1:57:17 | #1301 |
States Raced
1 race 2 races 3-4 races 5+ races
State Breakdown
ILIllinois
10 racesMDMaryland
3 racesNDNorth Dakota
2 racesCOColorado
1 raceMIMichigan
1 raceWIWisconsin
1 raceAZArizona
0 racesMNMinnesota
0 racesPAPennsylvania
0 races50-State Challenge
9/ 51 states + DC
42 states to go