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JO
Justin O'Brien
MalePennsylvania2007–2025
17
Total Finishes
15
Different Races
7
States (14%)
1:19:31
PR (6:04/mi)
1:42:56
Average
-0:13:17
Faster (first to last)
Medal House
2020
SLTC Frostbite Series
1:22:23
#14 overall#13 gender
2018
OCNJ Half Marathon, 10 Mile & 5K
1:21:26
#4 overall#4 gender
2018
Philadelphia Mayor's Cup
1:45:54
#3 overall#3 gender
2017
Runner's World Half Marathon and Festival
1:29:16
#43 overall#37 gender
2016
Just A Short Run
1:19:31
#6 overall#6 gender
2016
Air Force Marathon
1:23:54
#10 overall#9 gender
2014
Bass Pro Shops Conservation Marathon
2:02:50
#524 overall#321 gender
2011
Rehoboth Seashore Marathon and Half Marathon
1:55:47
#258 overall#156 gender
2011
Sunrise Marathon 5K/10K/13.1 SAN FRANCISCO
2:10:10
#2086 overall#1219 gender
2009
Life Time Chicago Half Marathon + 5K
1:53:09
#2412 overall#1756 gender
2009
Half Wit Half Marathon Trail Run
1:55:13
#23 overall#23 gender
2007
Half Wit Half Marathon Trail Run
1:59:31
#49 overall#49 gender
Performance Timeline
Complete Race Log
| Year | Race | State | Time | Place |
|---|---|---|---|---|
| 2025 | The Jersey City Spring Half MarathonJersey City | NJ | 1:46:14 | #18 |
| 2022 | Hamburg Half MarathonHamburg | PA | 1:25:08 | #5 |
| 2022 | Philadelphia MarathonPhiladelphia | PA | 1:30:30 | #469 |
| 2022 | 2025 Disney Princess Half Marathon Weekend presented by CORKCICLE®Orlando | FL | 1:41:03 | #99 |
| 2022 | Philadelphia Mayor's CupPhiladelphia | PA | 1:47:36 | #14 |
| 2022 | 2026 Disney Wine & Dine Half Marathon WeekendOrlando | FL | 1:50:42 | #219 |
| 2020 | SLTC Frostbite SeriesSaint Louis | MO | 1:22:23 | #14 |
| 2018 | OCNJ Half Marathon, 10 Mile & 5KOcean City | NJ | 1:21:26 | #4 |
| 2018 | Philadelphia Mayor's CupPhiladelphia | PA | 1:45:54 | #3 |
| 2017 | Runner's World Half Marathon and FestivalBethlehem | PA | 1:29:16 | #43 |
| 2016 | Just A Short RunAllison Park | PA | 1:19:31 | #6 |
| 2016 | Air Force Marathon | — | 1:23:54 | #10 |
| 2014 | Bass Pro Shops Conservation MarathonSpringfield | MO | 2:02:50 | #524 |
| 2011 | Rehoboth Seashore Marathon and Half MarathonRehoboth Beach | DE | 1:55:47 | #258 |
| 2011 | Sunrise Marathon 5K/10K/13.1 SAN FRANCISCOSan Francisco | CA | 2:10:10 | #2086 |
| 2009 | Life Time Chicago Half Marathon + 5KChicago | IL | 1:53:09 | #2412 |
| 2009 | Half Wit Half Marathon Trail RunReading | PA | 1:55:13 | #23 |
| 2007 | Half Wit Half Marathon Trail RunReading | PA | 1:59:31 | #49 |
States Raced
1 race 2 races 3-4 races 5+ races
State Breakdown
PAPennsylvania
8 racesMOMissouri
2 racesNJNew Jersey
2 racesCACalifornia
1 raceDEDelaware
1 raceILIllinois
1 raceTXTexas
0 races50-State Challenge
7/ 50 states
43 states to go