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WO
William O'Brien
MaleNew York1988–2025
55
Total Finishes
30
Distinct Races
19
States (37%)
1:32:33
PR (7:04/mi)
2:08:02
Average
+0:47:11
Slower (first to last)
Medal House
2004
NYCRUNS Brooklyn Ice Cream Social Half Marathon
1:54:23
#841 overall#715 gender
2004
Eversource Hartford Marathon, Half Marathon, Relay & Charity 5K
2:14:41
#1423 overall#787 gender
2004
The Unforgettable Staten Island Half Marathon!
2:27:26
#2759 overall#1827 gender
2004
NYRR Fred Lebow Half Marathon
2:35:26
#5357 overall#3209 gender
2003
The LESS Popular Brooklyn Half Marathon!
1:46:58
#1102 overall#881 gender
2000
2025 Val Nolasco Half Marathon
2:04:39
#395 overall#297 gender
1998
NYCRUNS Brooklyn Ice Cream Social Half Marathon
2:16:57
#1578 overall#1087 gender
1998
NYRR Fred Lebow Half Marathon
2:20:45
#3410 overall#2108 gender
1998
The LESS Popular Brooklyn Half Marathon!
2:27:25
#1904 overall#1289 gender
1998
The Unforgettable Staten Island Half Marathon!
2:31:36
#2473 overall#1585 gender
1993
LONG ISLAND MARATHON FESTIVAL
2:01:58
#2914 overall#2478 gender
1988
Dayton River Corridor Classic
1:52:10
#997 overall#905 gender
Performance Timeline
Complete Race Log
| Year | Race | State | Time | Place |
|---|---|---|---|---|
| 2025 | All-Out Fa La LaWestminster | CO | 1:46:58 | #25 |
| 2025 | Fairfield Road RacesFairfield | CT | 1:49:47 | #531 |
| 2025 | Oak Barrel Half MarathonLynchburg | TN | 2:39:21 | #637 |
| 2024 | CHaD Hero Half MarathonHanover | NH | 1:36:43 | #29 |
| 2024 | Fairfield Road RacesFairfield | CT | 2:05:56 | #1068 |
| 2024 | Kaiser Permanente Colfax MarathonDenver | CO | 2:10:03 | #2129 |
| 2023 | Fairfield Road RacesFairfield | CT | 1:50:34 | #516 |
| 2023 | Greenbrier Half MarathonWhite Sulphur Springs | WV | 1:57:53 | #40 |
| 2023 | The Unforgettable Staten Island Half Marathon!Staten Island | NY | 2:28:19 | #7558 |
| 2022 | Eugene Marathon 2024Eugene | OR | 1:38:05 | #370 |
| 2022 | Fairfield Road RacesFairfield | CT | 1:48:49 | #238 |
| 2022 | The Unforgettable Staten Island Half Marathon!Staten Island | NY | 2:37:24 | #6735 |
| 2022 | Good Life HalfsyLincoln | NE | 2:43:59 | #2995 |
| 2018 | United Airlines NYC HalfNew York | NY | 1:54:28 | #6846 |
| 2018 | Run For Your HeartSaginaw | MI | 2:20:30 | #105 |
| 2017 | The Unforgettable Staten Island Half Marathon!Staten Island | NY | 1:47:30 | #1666 |
| 2015 | 2026 - San Antonio MarathonSan Antonio | TX | 1:34:50 | #221 |
| 2015 | Santa To The Sea 1/2 Marathon, 1/4 Marathon & 5KOxnard | CA | 2:15:56 | #815 |
| 2014 | United Airlines NYC HalfNew York | NY | 1:55:02 | #7496 |
| 2014 | The LESS Popular Brooklyn Half Marathon!Brooklyn | NY | 1:58:42 | #11403 |
| 2014 | Fleet Feet Rochester Half Marathon | 5K | Kids 1/2 MileRochester | NY | 2:10:39 | #907 |
| 2014 | NYRR Fred Lebow Half MarathonNew York | NY | 2:45:00 | #3856 |
| 2013 | The Unforgettable Staten Island Half Marathon!Staten Island | NY | 1:33:07 | #379 |
| 2013 | United Airlines NYC HalfNew York | NY | 1:42:50 | #2377 |
| 2013 | Run For Your HeartSaginaw | MI | 2:00:30 | #65 |
| 2013 | NYRR Fred Lebow Half MarathonNew York | NY | 2:06:00 | #3095 |
| 2012 | The Unforgettable Staten Island Half Marathon!Staten Island | NY | 1:32:33 | #398 |
| 2012 | Midwest Financial Group Madison Mini MarathonMadison | WI | 1:46:02 | #654 |
| 2012 | MO' Cowbell Marathon/Half-Marathon/10K/5KSaint Charles | MO | 1:47:58 | #387 |
| 2012 | Haunted Hustle - MiddletonMiddleton | WI | 1:49:32 | #161 |
| 2012 | 2027 Walt Disney World® Marathon WeekendOrlando | FL | 2:33:49 | #11049 |
| 2012 | Area 13.1 Half MarathonRoswell | GA | 2:54:06 | #1421 |
| 2011 | Lake Placid Marathon and Half and 10KLake Placid | NY | 2:28:10 | #988 |
| 2009 | United Airlines NYC HalfNew York | NY | 1:32:48 | #432 |
| 2008 | Rock 'n' Roll San JoseSan Jose | CA | 2:33:01 | #6635 |
| 2007 | 2026 Disneyland® Half Marathon Weekend presented by HONDAAnaheim | CA | 1:42:45 | #240 |
| 2007 | Rock ‘n’ Roll Philadelphia Half MarathonPhiladelphia | PA | 1:46:32 | #2784 |
| 2007 | United Airlines NYC HalfNew York | NY | 1:51:12 | #2929 |
| 2007 | NYRR Fred Lebow Half MarathonNew York | NY | 2:00:34 | #2480 |
| 2007 | Kentucky Derby Festival Race WeekendLouisville | KY | 3:38:25 | #7882 |
| 2006 | NYCRUNS Brooklyn Ice Cream Social Half MarathonBrooklyn | NY | 2:03:19 | #2006 |
| 2006 | The LESS Popular Brooklyn Half Marathon!Brooklyn | NY | 2:04:33 | #2580 |
| 2006 | NYRR Fred Lebow Half MarathonNew York | NY | 2:08:31 | #2556 |
| 2005 | Fairfield Road RacesFairfield | CT | 2:13:33 | #1265 |
| 2004 | NYCRUNS Brooklyn Ice Cream Social Half MarathonBrooklyn | NY | 1:54:23 | #841 |
| 2004 | Eversource Hartford Marathon, Half Marathon, Relay & Charity 5KHartford | CT | 2:14:41 | #1423 |
| 2004 | The Unforgettable Staten Island Half Marathon!Staten Island | NY | 2:27:26 | #2759 |
| 2004 | NYRR Fred Lebow Half MarathonNew York | NY | 2:35:26 | #5357 |
| 2004 | Sunrise Marathon 5K/10K/13.1 SAN FRANCISCOSan Francisco | CA | 3:20:30 | #1662 |
| 2003 | The LESS Popular Brooklyn Half Marathon!Brooklyn | NY | 1:46:58 | #1102 |
| 2000 | 2025 Val Nolasco Half MarathonHonolulu | HI | 2:04:39 | #395 |
| 1998 | NYCRUNS Brooklyn Ice Cream Social Half MarathonBrooklyn | NY | 2:16:57 | #1578 |
| 1998 | NYRR Fred Lebow Half MarathonNew York | NY | 2:20:45 | #3410 |
| 1998 | The LESS Popular Brooklyn Half Marathon!Brooklyn | NY | 2:27:25 | #1904 |
| 1998 | The Unforgettable Staten Island Half Marathon!Staten Island | NY | 2:31:36 | #2473 |
| 1993 | LONG ISLAND MARATHON FESTIVALEast Meadow | NY | 2:01:58 | #2914 |
| 1988 | Dayton River Corridor ClassicDayton | OH | 1:52:10 | #997 |
States Raced
1 race 2 races 3-4 races 5+ races
State Breakdown
NYNew York
28 racesCTConnecticut
6 racesCACalifornia
4 racesCOColorado
2 racesMIMichigan
2 racesWIWisconsin
2 racesFLFlorida
1 raceGAGeorgia
1 raceHIHawaii
1 raceKYKentucky
1 raceMOMissouri
1 raceNENebraska
1 raceOHOhio
1 raceTXTexas
1 raceDCDistrict of Columbia
0 racesMAMassachusetts
0 racesMNMinnesota
0 racesNJNew Jersey
0 racesVAVirginia
0 races50-State Challenge
19/ 51 states + DC
32 states to go