HalfRuns
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Molly O'Brien

FemaleCalifornia2005–2026

64

Total Finishes

51

Distinct Races

20

States (39%)

1:19:33

PR (6:04/mi)

2:06:51

Average

-0:20:48

Faster (first to last)

Medal House

2009

St. Jude Rock 'n' Roll Seattle

1:54:50
#2143 overall#947 gender
2009

NYRR Fred Lebow Half Marathon

2:02:33
#2842 overall#816 gender
2008

Rock n Roll Nashville

2:10:21
#7686 overall#3428 gender
2008

Rock ‘n’ Roll Philadelphia Half Marathon

2:19:18
#9922 overall#4397 gender
2007

Philadelphia Marathon

2:19:13
#1507 overall#1504 gender
2007

Rock 'n' Roll Los Angeles Half Marathon

2:34:21
#2487 overall#1073 gender
2007

OC Marathon - Half Marathon - 5K

2:35:34
#3684 overall#1544 gender
2007

Surf City Marathon

2:36:18
#5582 overall#2790 gender
2006

Surf City Marathon

2:21:49
#3540 overall#1668 gender
2006

Sarasota Half Marathon

2:23:39
#589 overall#281 gender
2005

Rock 'n' Roll Virgina Beach Half Marathon

2:22:56
#9095 overall#4172 gender
2005

La Jolla Half Marathon & 5K

2:26:41
#3383 overall#1398 gender

Performance Timeline

PR 1:19:3320052005200620062007200720072007200820082009200920092009201020112011201220122012201220122012201220122013201320132014201420142014201420142014201420152015201520152015201620162016201720172017201720172018201820182018201920192019201920192019202120212022202220222023202320232024202520252026

Complete Race Log

YearRaceStateTimePlace
2026Austin MarathonAustinTX2:02:08#4181
2025The Notre Dame Holy HalfNotre DameIN1:57:25#593
2025Dallas Marathon WeekendDallasTX2:06:44#3396
2024Geneva Half Marathon, 5K, & Half Marathon Relay presented by Red Jacket OrchardsGenevaNY2:04:33#160
2023United Airlines NYC HalfNew YorkNY1:47:38#5380
2023Run Like Hell Half Marathon/10K/5KPortlandOR1:59:17#58
2023Angel Island Half Marathon & 10KTiburonCA2:16:06#49
2022Ventura MarathonVenturaCA1:40:24#260
2022United Airlines NYC HalfNew YorkNY1:46:43#4452
2022Queen Bee Half MarathonCincinnatiOH1:57:23#352
2021Urban Wildland Half Marathon & 5K (Richfield, MN)RichfieldMN1:51:05#134
2021NYCRUNS Falling Leaves Half MarathonBrooklynNY2:09:13#353
2019Heart Mini MarathonCincinnatiOH1:19:33#299
2019Women's Half MarathonNew YorkNY1:53:45#576
2019Flying Pig Pump and RunCincinnatiOH1:55:43#1700
2019Run SAN DIEGO 5K/10K/13.1San DiegoCA2:01:00#1531
2019Ventura MarathonVenturaCA2:08:00#577
2019United Airlines NYC HalfNew YorkNY2:13:04#15603
2018Ipswich Ale Half MarathonIpswichMA2:05:24#343
2018South Shore Half Marathon and 5KHanoverMA2:08:35#309
2018Flying Pig Pump and RunCincinnatiOH2:28:23#6339
2018Rock ‘n’ Roll Denver Marathon & 1/2 MarathonDenverCO2:52:13#3910
2017Cincinnati Hungry Turkey Half Marathon & 5KCincinnatiOH1:50:56#80
2017Ventura MarathonVenturaCA1:53:51#256
2017Flying Pig Pump and RunCincinnatiOH1:54:27#1582
2017Novo Nordisk New Jersey MarathonLong BranchNJ2:00:28#1215
2017Rockfest Half MarathonHampton BeachNH2:06:19#1996
2016B.A.A. Half MarathonBostonMA1:58:38#2399
2016UTHealth Houston Half Marathon & 10KHoustonTX2:03:38#1384
2016NYCRUNS Falling Leaves Half MarathonBrooklynNY2:05:14#441
2015Kentucky Derby Festival Race WeekendLouisvilleKY1:51:00#1305
2015Emerald Isle MarathonEmerald IsleNC1:51:20#152
2015C&D Canal Half Marathon & 5KNew CastleDE1:57:51#84
2015Annapolis Running ClassicAnnapolisMD1:58:17#734
2015Fargo Marathon WeekendFargoND2:07:30#2307
20142025 500 Festival Running EventsIndianapolisIN1:54:17#4152
2014Philadelphia MarathonPhiladelphiaPA1:54:40#3038
2014Mighty Niagara Half Marathon & Hospice Dash 5KYoungstownNY1:59:09#361
2014The LESS Popular Brooklyn Half Marathon!BrooklynNY2:00:11#12189
2014Sleepy Hollow Half MarathonSleepy HollowNY2:04:35#492
2014Battleship North Carolina Half 5KWilmingtonNC2:13:42#599
20142025 Marine Corps Half Marathon presented by FirstLight Home Care & Capital Automotive GroupCamp LejeuneNC2:16:58#555
2014Sarasota Half MarathonSarasotaFL2:21:38#1725
2013Scenic City TrailChattanoogaTN2:00:23#61
2013Skunk Cabbage Classic 10K & Half MarathonIthacaNY2:03:51#431
2013Santa Barbara Wine Country Half MarathonSolvangCA2:48:23#1983
2012Heart Mini MarathonCincinnatiOH1:49:01#427
2012Glen Arbor Solstice Half Marathon & 5KGlen ArborMI1:51:44#44
2012Second Wind Christie Clinic Illinois Race Weekend Training ProgramChampaignIL1:54:37#1508
2012Providence Rhode RacesEast ProvidenceRI1:55:28#691
2012Mohawk Hudson River MarathonUnknownNY2:05:12#355
2012The LESS Popular Brooklyn Half Marathon!BrooklynNY2:05:19#8622
2012Rock 'n' Roll Chicago Half MarathonChicagoIL2:12:51#5692
2012Women's Half MarathonNew YorkNY2:14:11#3169
2011Philadelphia MarathonPhiladelphiaPA1:47:50#1115
2011IMT Des Moines MarathonDes MoinesIA2:29:26#2940
2010Frederick Running FestivalFrederickMD2:03:05#835
2009St. Jude Rock 'n' Roll SeattleSeattleWA1:54:50#2143
2009NYRR Fred Lebow Half MarathonNew YorkNY2:02:33#2842
2009OC Marathon - Half Marathon - 5KNewport BeachCA2:43:29#3538
2009Extraterrestrial Full MoonRachelNV2:44:46#172
2008Rock n Roll NashvilleNashvilleTN2:10:21#7686
2008Rock ‘n’ Roll Philadelphia Half MarathonPhiladelphiaPA2:19:18#9922
2007Philadelphia MarathonPhiladelphiaPA2:19:13#1507
2007Rock 'n' Roll Los Angeles Half MarathonLos AngelesCA2:34:21#2487
2007OC Marathon - Half Marathon - 5KNewport BeachCA2:35:34#3684
2007Surf City MarathonHuntington BeachCA2:36:18#5582
2006Surf City MarathonHuntington BeachCA2:21:49#3540
2006Sarasota Half MarathonSarasotaFL2:23:39#589
2005Rock 'n' Roll Virgina Beach Half MarathonVirginia BeachVA2:22:56#9095
2005La Jolla Half Marathon & 5KSan DiegoCA2:26:41#3383

States Raced

1 race 2 races 3-4 races 5+ races

State Breakdown

NYNew York
15 races
CACalifornia
12 races
OHOhio
7 races
PAPennsylvania
4 races
MAMassachusetts
3 races
NCNorth Carolina
3 races
TXTexas
3 races
FLFlorida
2 races
ILIllinois
2 races
INIndiana
2 races
TNTennessee
2 races
COColorado
1 race
IAIowa
1 race
KYKentucky
1 race
MIMichigan
1 race
MNMinnesota
1 race
WAWashington
1 race
CTConnecticut
0 races
DCDistrict of Columbia
0 races
WIWisconsin
0 races

50-State Challenge

20/ 51 states + DC

31 states to go