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Brian O'Sullivan

MaleColorado2021–2025

8

Total Finishes

7

Distinct Races

5

States (10%)

1:33:49

PR (7:10/mi)

1:47:14

Average

+0:02:30

Slower (first→last)

Medal House

2025

The Steamboat Marathon

Steamboat Springs, CO

1:44:57
#72 overall#49 gender
roadflat
2025

Chi Town Half Marathon & 10K

Chicago, IL

1:39:36
#155 overall#134 gender
roadflat
2025

2026 Chessie Trail Marathon, Half Marathon, 10K, 5K, & 26.2 Relay

Lexington, VA

1:39:06.46
#25 overall
roadflat
2024

NYCRUNS Brooklyn Half Marathon

Brooklyn, NY

1:33:49
#669 overall#604 gender
roadflat
2023

All-Out Dog Days

Westminster, CO

#49 overall
roadflat
2023

Horsetooth Half Marathon - Presented by Fort Collins Connexion

Fort Collins, CO

1:41:47
#224 overall
roadflat
2022

Skyline Half Marathon

Dallas, TX

2:05:32
#168 overall#115 gender
roadflat
2021

Horsetooth Half Marathon - Presented by Fort Collins Connexion

Fort Collins, CO

1:42:27
#188 overall
roadflat

Performance Timeline

PR 1:33:4920211:42:2720222:05:3220232:10:4020231:41:4720241:33:4920251:44:5720251:39:3620251:39:06

Complete Race Log

YearRaceStateTimePlace
2025The Steamboat MarathonSteamboat SpringsCO1:44:57#72
2025Chi Town Half Marathon & 10KChicagoIL1:39:36#155
20252026 Chessie Trail Marathon, Half Marathon, 10K, 5K, & 26.2 RelayLexingtonVA1:39:06.46#25
2024NYCRUNS Brooklyn Half MarathonBrooklynNY1:33:49#669
2023All-Out Dog DaysWestminsterCO—#49
2023Horsetooth Half Marathon - Presented by Fort Collins ConnexionFort CollinsCO1:41:47#224
2022Skyline Half MarathonDallasTX2:05:32#168
2021Horsetooth Half Marathon - Presented by Fort Collins ConnexionFort CollinsCO1:42:27#188

States Raced

1 race 2 races 3-4 races 5+ races

State Breakdown

COColorado
4 races
TXTexas
1 race
NYNew York
1 race
ILIllinois
1 race
VAVirginia
1 race

50-State Challenge

5/ 51 states + DC

46 states to go