HalfRuns
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Mike O'Brien

MaleCalifornia1997–2025

66

Total Finishes

38

Distinct Races

18

States (35%)

1:16:18

PR (5:49/mi)

2:08:27

Average

+0:30:56

Slower (first to last)

Medal House

2007

Shamrock'n Half Marathon

1:41:54
#237 overall#190 gender
2007

Baltimore Running Festival

1:52:07
#956 overall#653 gender
2007

La Jolla Half Marathon & 5K

2:16:34
#3121 overall#1748 gender
2005

La Jolla Half Marathon & 5K

1:46:28
#692 overall#555 gender
2005

B.A.A. Half Marathon

2:14:39
#2551 overall#1281 gender
2004

Surf City Marathon

1:33:32
#200 overall#171 gender
2004

DRC Half Marathon and 5K

2:15:11
#2065 overall#1286 gender
2002

JENKS HALF MARATHON & 5K

1:32:59
#29 overall#28 gender
2002

Maine Marathon, Half Marathon and Marathon Relay

1:49:30
#386 overall#279 gender
1999

Maine Marathon, Half Marathon and Marathon Relay

1:45:21
#217 overall#163 gender
1999

NYRR Fred Lebow Half Marathon

2:29:33
#3648 overall#2139 gender
1997

Maine Marathon, Half Marathon and Marathon Relay

1:45:52
#206 overall#164 gender

Performance Timeline

PR 1:16:18199719991999200220022004200420052005200720072007200720082008200820082008200920092012201220122012201220122013201320132013201320132014201420142015201520152016201620162016201620162017201720172017201820182018201820192019201920202021202220222023202320232024202420242024202420252025

Complete Race Log

YearRaceStateTimePlace
2025Thanksgiving Distance ClassicJacksonvilleFL1:54:40#320
2025Rehoboth Seashore Marathon and Half MarathonRehoboth BeachDE2:16:48#1163
2024Thanksgiving Distance ClassicJacksonvilleFL1:49:31#218
2024Big Beach Marathon, Half Marathon & Safari 5KGulf ShoresAL1:59:57#175
2024Publix Atlanta Marathon, Half Marathon & 5KAtlantaGA2:02:42#1655
2024Great Smoky Mountains Half Marathon & 5KTownsendTN2:17:38#368
2024Harborside Half Marathon & 5KNewburyportMA2:18:07#965
2023Thanksgiving Distance ClassicJacksonvilleFL1:51:33#232
2023The Run For The AnimalsWachapreagueVA2:08:56#28
20232027 Walt Disney World® Marathon WeekendOrlandoFL3:19:54#9584
2022Thanksgiving Distance ClassicJacksonvilleFL1:47:54#165
2022USO Half Marathon and 5KJacksonvilleFL1:50:20#154
2021Maine Marathon, Half Marathon and Marathon RelayPortlandME2:01:41#622
2020Surf City MarathonHuntington BeachCA2:15:36#3954
2019Thanksgiving Distance ClassicJacksonvilleFL1:46:04#238
2019Carlsbad MarathonCarlsbadCA2:29:20#2943
2019Napa to Sonoma Wine Country Half MarathonSonomaCA3:01:29#2051
2018USO Half Marathon and 5KJacksonvilleFL1:47:46#88
2018Crawlin' Crab Half MarathonHamptonVA2:21:13#572
2018Carlsbad MarathonCarlsbadCA2:33:46#3018
2018Historic Half Training (sponsored by FARC)FredericksburgVA3:01:47#3300
20172026 - San Antonio MarathonSan AntonioTX2:14:50#2927
2017Detroit Free Press MarathonDetroitMI2:20:07#3848
20172027 Syracuse Half MarathonSyracuseNY2:47:59#2590
2017Rock 'n' Roll Half Marathon San FranciscoSan FranciscoCA2:51:52#5375
2016Surf City MarathonHuntington BeachCA1:52:12#1070
2016Sea Turtle & Sweetheart Running FestivalGulf ShoresAL1:54:20#41
2016Key West Half Marathon & 5K, 8K, 10K, Rum Stroll & Beer MileKey WestFL2:00:00#395
2016Steamboat Springs Marathon/Half Marathon/10KSteamboat SpringsCO2:15:45#533
2016Historic Half Training (sponsored by FARC)FredericksburgVA2:24:35#3252
2016Keesler Federal Mississippi Gulf Coast MarathonBiloxiMS2:30:46#845
2015Surf City MarathonHuntington BeachCA1:51:11#1516
2015Urban Cow Half MarathonSacramentoCA2:10:58#1192
2015Delaware Running FestivalWilmingtonDE2:11:00#489
2014DONNA Marathon WeekendJacksonville BeachFL1:31:31#21
2014Surf City MarathonHuntington BeachCA1:42:21#852
2014La Jolla Half Marathon & 5KSan DiegoCA2:38:19#4831
2013Jacksonville Bank Marathon, Half MarathonJacksonvilleFL1:33:09#46
2013Surf City MarathonHuntington BeachCA1:45:28#1087
2013Carlsbad MarathonCarlsbadCA2:04:21#2504
2013Urban Cow Half MarathonSacramentoCA2:08:45#1335
2013Baltimore Running FestivalBaltimoreMD2:15:17#4931
2013Run SAN DIEGO 5K/10K/13.1San DiegoCA3:02:34#5333
2012OC Marathon - Half Marathon - 5KNewport BeachCA1:43:08#447
2012Surf City MarathonHuntington BeachCA1:45:45#1154
20122026 2XU Long Beach Marathon & Half MarathonLong BeachCA1:49:02#748
2012Carlsbad MarathonCarlsbadCA2:05:03#2819
2012Delaware Running FestivalWilmingtonDE2:05:36#422
2012Rock 'n' Roll San DiegoSan DiegoCA2:12:22#6537
2009Shamrock'n Half MarathonSacramentoCA1:55:51#1004
2009La Jolla Half Marathon & 5KSan DiegoCA2:21:08#3775
2008Seacoast Half MarathonPortsmouthNH1:16:18#3
2008Surf City MarathonHuntington BeachCA2:01:27#2372
2008Carlsbad MarathonCarlsbadCA2:09:24#3244
2008Beer City Half™ San DiegoSan DiegoCA2:17:22#3811
2008La Jolla Half Marathon & 5KSan DiegoCA3:28:00#2235
2007Shamrock'n Half MarathonSacramentoCA1:41:54#237
2007Baltimore Running FestivalBaltimoreMD1:52:07#956
2007La Jolla Half Marathon & 5KSan DiegoCA2:16:34#3121
2007Carlsbad MarathonCarlsbadCA2:19:13#3918
2005La Jolla Half Marathon & 5KSan DiegoCA1:46:28#692
2005B.A.A. Half MarathonBostonMA2:14:39#2551
2004Surf City MarathonHuntington BeachCA1:33:32#200
2004DRC Half Marathon and 5KDallasTX2:15:11#2065
2002JENKS HALF MARATHON & 5KJENKSOK1:32:59#29
2002Maine Marathon, Half Marathon and Marathon RelayPortlandME1:49:30#386
1999Maine Marathon, Half Marathon and Marathon RelayPortlandME1:45:21#217
1999NYRR Fred Lebow Half MarathonNew YorkNY2:29:33#3648
1997Maine Marathon, Half Marathon and Marathon RelayPortlandME1:45:52#206

States Raced

1 race 2 races 3-4 races 5+ races

State Breakdown

CACalifornia
30 races
FLFlorida
11 races
MEMaine
4 races
VAVirginia
4 races
DEDelaware
3 races
MAMassachusetts
2 races
MDMaryland
2 races
NYNew York
2 races
TXTexas
2 races
COColorado
1 race
MIMichigan
1 race
MSMississippi
1 race
NHNew Hampshire
1 race
OKOklahoma
1 race
TNTennessee
1 race
OHOhio
0 races
VTVermont
0 races
WIWisconsin
0 races

50-State Challenge

18/ 51 states + DC

33 states to go