HalfRuns
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Nancy O'Brien

FemaleIllinois2001–2025

42

Total Finishes

26

Different Races

10

States (20%)

1:43:03

PR (7:52/mi)

2:33:13

Average

+0:39:32

Slower (first to last)

Medal House

2011

Cape Cod Marathon Weekend

1:43:03
#95 overall#23 gender
2009

Rock 'n' Roll Chicago Half Marathon

2:08:38
#5872 overall#2784 gender
2009

Rock 'n' Roll Nashville

2:17:56
#7998 overall#3698 gender
2008

Rock 'n' Roll Chicago Half Marathon

2:15:23
#5339 overall#2248 gender
2007

Rock 'n' Roll Nashville

2:07:17
#5803 overall#2411 gender
2006

Fleet Feet Rochester Half Marathon | 5K | Kids 1/2 Mile

2:13:25
#598 overall#267 gender
2005

Rock 'n' Roll Chicago Half Marathon

2:20:12
#3407 overall#1396 gender
2005

Avenue of the Giants Marathon

3:10:27
#850 overall#510 gender
2004

Sunrise Marathon 5K/10K/13.1 SAN FRANCISCO

3:20:29
#1661 overall#901 gender
2003

Community First Fox Cities Marathon presented by Miron Construction

2:09:06
#794 overall#351 gender
2003

Community First Fox Cities Marathon

2:09:06
#793 overall#351 gender
2001

2027 WALT DISNEY WORLD® Marathon Weekend presented by State Farm® With A Running Passion

3:04:47
#3615 overall#2108 gender

Performance Timeline

PR 1:43:03200120032003200420052005200620072008200920092011201220122012201320132013201420142014201420142015201520162017201720172020202120212022202220222023202320232024202420242025

Complete Race Log

YearRaceStateTimePlace
2025Kentucky Derby Festival Race WeekendLouisvilleKY3:44:19#6083
2024Madison MarathonMadisonWI2:29:59#2651
2024Madison MarathonMadisonWI2:29:59#2651
20242026 Disney Wine & Dine Half Marathon WeekendOrlandoFL3:41:01#11586
2023Detroit Free Press MarathonDetroitMI2:37:06#5972
2023Life Time Chicago Half Marathon + 5KChicagoIL2:49:17#6434
20232025 Disney Princess Half Marathon Weekend presented by CORKCICLE®OrlandoFL3:22:46#9697
2022Second Wind Christie Clinic Illinois Race Weekend Training ProgramChampaignIL2:20:43#1592
2022Detroit Free Press MarathonDetroitMI2:22:38#3374
20222027 WALT DISNEY WORLD® Marathon Weekend presented by State Farm® With A Running PassionOrlandoFL2:52:06#6125
2021Naperville Half MarathonNapervilleIL2:14:01#796
2021Adirondack Marathon Distance FestivalSchroon LakeNY3:13:26#274
20202025 Disney Princess Half Marathon Weekend presented by CORKCICLE®OrlandoFL2:58:05#9111
2017Naperville Half MarathonNapervilleIL2:16:56#1438
2017Rock 'n' Roll Chicago Half MarathonChicagoIL2:26:58#6185
2017Flying Pig Pump and RunCincinnatiOH2:40:02#7363
2016Detroit Free Press MarathonDetroitMI3:10:27#9220
201518th Annual F^3 Lake Half Marathon & 5kChicagoIL1:56:08#620
2015Naperville Half MarathonNapervilleIL2:14:07#1617
2014March Madness Half MarathonCaryIL1:43:20#256
2014Rock 'n' Roll Chicago Half MarathonChicagoIL2:15:41#6659
2014Fox Valley Marathon RacesSaint CharlesIL2:16:55#869
201418th Annual F^3 Lake Half Marathon & 5kChicagoIL2:43:00#1222
2014Rock 'n' Roll Los Angeles Half MarathonLos AngelesCA2:54:02#6181
2013Naperville Half MarathonNapervilleIL2:12:44#743
2013Rock 'n' Roll Chicago Half MarathonChicagoIL2:16:39#6558
201318th Annual F^3 Lake Half Marathon & 5kChicagoIL2:22:57#1095
2012Fox Valley Marathon RacesSaint CharlesIL2:13:51#462
2012Fleet Feet Rochester Half Marathon | 5K | Kids 1/2 MileRochesterNY2:28:47#1429
2012Detroit Free Press MarathonDetroitMI2:47:36#7087
2011Cape Cod Marathon WeekendFalmouthMA1:43:03#95
2009Rock 'n' Roll Chicago Half MarathonChicagoIL2:08:38#5872
2009Rock 'n' Roll NashvilleNashvilleTN2:17:56#7998
2008Rock 'n' Roll Chicago Half MarathonChicagoIL2:15:23#5339
2007Rock 'n' Roll NashvilleNashvilleTN2:07:17#5803
2006Fleet Feet Rochester Half Marathon | 5K | Kids 1/2 MileRochesterNY2:13:25#598
2005Rock 'n' Roll Chicago Half MarathonChicagoIL2:20:12#3407
2005Avenue of the Giants MarathonArcataCA3:10:27#850
2004Sunrise Marathon 5K/10K/13.1 SAN FRANCISCOSan FranciscoCA3:20:29#1661
2003Community First Fox Cities Marathon presented by Miron ConstructionMenashaWI2:09:06#794
2003Community First Fox Cities Marathon—2:09:06#793
20012027 WALT DISNEY WORLD® Marathon Weekend presented by State Farm® With A Running PassionOrlandoFL3:04:47#3615

States Raced

1 race 2 races 3-4 races 5+ races

State Breakdown

ILIllinois
18 races
FLFlorida
5 races
MIMichigan
4 races
WIWisconsin
3 races
CACalifornia
3 races
NYNew York
3 races
TNTennessee
2 races
MAMassachusetts
1 race
OHOhio
1 race
KYKentucky
1 race

50-State Challenge

10/ 50 states

40 states to go