HalfRuns
Back to League Tables

Dennis O'Brien

MaleNew York2003–2025

41

Total Finishes

21

Different Races

8

States (16%)

1:23:43

PR (6:23/mi)

2:13:51

Average

+0:25:58

Slower (first to last)

Medal House

2015

Maine Marathon, Half Marathon and Marathon Relay

1:53:15
#514 overall
2015

Rochester Regional Health Flower City Challenge

1:58:09
#777 overall
2015

Shipyard Old Port Half Marathon

2:00:06
#1016 overall#601 gender
2014

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

2:02:21
#634 overall
2014

Shipyard Old Port Half Marathon

2:03:15
#1076 overall#577 gender
2014

Naperville Half Marathon

2:40:02
#2824 overall#1195 gender
2013

Maine Marathon, Half Marathon and Marathon Relay

1:52:30
#528 overall
2013

Rochester Regional Health Flower City Challenge

2:14:08
#1614 overall#839 gender
2012

Rochester Regional Health Flower City Challenge

2:14:30
#1645 overall#826 gender
2011

Sunrise Marathon 5K/10K/13.1 SAN FRANCISCO

2:54:33
#5788 overall#2658 gender
2005

LONG ISLAND MARATHON FESTIVAL

1:23:43
#38 overall#37 gender
2003

Jersey Shore Half Marathon and 2 Mile Run

1:56:54
#324 overall#226 gender

Performance Timeline

PR 1:23:43200320052011201220132013201420142014201520152015201520152015201620162016201620172017201720172017201820182018201920192019201920192020202120212021202220222023202420242025

Complete Race Log

YearRaceStateTimePlace
2025Sunburst Races - South BendSouth BendIN2:22:52#555
2024Harborside Half Marathon & 5KNewburyportMA2:01:21#606
2024Rochester Regional Health Flower City ChallengeRochesterNY2:34:35#968
2023Winter Warrior Half Marathon, Quarter Marathon & Half Marathon RelayRochesterNY2:41:37#138
20222025 Aramco Houston Half Marathon Searchable Finish Line VideoHoustonTX2:23:33#6033
2022Rochester Regional Health Flower City ChallengeRochesterNY2:28:24#631
2021Wallis Sands Half MarathonRyeNH1:57:05#145
2021Winter Warrior Half Marathon, Quarter Marathon & Half Marathon RelayRochesterNY2:17:30#46
2021Rochester Regional Health Flower City ChallengeRochesterNY2:21:03#258
2020Winter Warrior Half Marathon, Quarter Marathon & Half Marathon RelayRochesterNY2:20:56#233
2019Colt State Park Half MarathonBristolRI1:57:16#116
2019Rochester Regional Health Flower City ChallengeRochesterNY2:06:44#764
2019Winter Warrior Half Marathon, Quarter Marathon & Half Marathon RelayRochesterNY2:17:32#345
20192025 Aramco Houston Half Marathon Searchable Finish Line VideoHoustonTX2:19:09#5879
2019Fleet Feet Rochester Half Marathon | 5K | Kids 1/2 MileRochesterNY2:26:42#644
201864th Annual Ocean Beach/John & Jessie Kelley Half MarathonNew LondonCT1:58:54#256
2018Rochester Regional Health Flower City ChallengeRochesterNY2:15:15#1140
2018OC Marathon - Half Marathon - 5KNewport BeachCA2:30:32#3606
2017Rochester Regional Health Flower City ChallengeRochesterNY1:54:55#624
2017South Shore Half Marathon and 5KHanoverMA1:59:31#557
2017Winter Warrior Half Marathon, Quarter Marathon & Half Marathon RelayRochesterNY2:11:35#323
2017OC Marathon - Half Marathon - 5KNewport BeachCA2:43:35#4573
2017Surf City MarathonHuntington BeachCA2:45:18#7324
2016Winter Warrior Half Marathon, Quarter Marathon & Half Marathon RelayRochesterNY2:07:49#409
2016Rochester Regional Health Flower City ChallengeRochesterNY2:08:51#1114
2016Baltimore Running FestivalBaltimoreMD2:10:49#3190
20162026 2XU Long Beach Marathon & Half MarathonLong BeachCA2:46:12#5467
2015Maine Marathon, Half Marathon and Marathon RelayPortlandME1:53:15#514
2015Rochester Regional Health Flower City ChallengeRochesterNY1:58:09#777
2015Shipyard Old Port Half MarathonPortlandME2:00:06#1016
2015Fleet Feet Rochester Half Marathon | 5K | Kids 1/2 MileRochesterNY2:04:57#823
2015Shoreline Half Marathon & 5KHamlinNY2:16:35#360
2015Winter Warrior Half Marathon, Quarter Marathon & Half Marathon RelayRochesterNY2:27:12#553
2014Fleet Feet Rochester Half Marathon | 5K | Kids 1/2 MileRochesterNY2:02:21#634
2014Shipyard Old Port Half MarathonPortlandME2:03:15#1076
2014Naperville Half MarathonNapervilleIL2:40:02#2824
2013Maine Marathon, Half Marathon and Marathon RelayPortlandME1:52:30#528
2013Rochester Regional Health Flower City ChallengeRochesterNY2:14:08#1614
2012Rochester Regional Health Flower City ChallengeRochesterNY2:14:30#1645
2011Sunrise Marathon 5K/10K/13.1 SAN FRANCISCOSan FranciscoCA2:54:33#5788
2005LONG ISLAND MARATHON FESTIVALEast MeadowNY1:23:43#38
2003Jersey Shore Half Marathon and 2 Mile RunHighlandsNJ1:56:54#324

States Raced

1 race 2 races 3-4 races 5+ races

State Breakdown

NYNew York
22 races
CACalifornia
5 races
MEMaine
4 races
MAMassachusetts
2 races
ILIllinois
1 race
INIndiana
1 race
MDMaryland
1 race
RIRhode Island
1 race

50-State Challenge

8/ 51 states + DC

43 states to go