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MO
Mary O�Brien
FemaleMassachusetts2025–2025
2
Total Finishes
2
Different Races
1
States (2%)
3:49:50
PR (17:33/mi)
3:51:46
Average
+2:01:40
Slower (first to last)
Medal House
2025
Mainly Marathons Prairie Series
3:49:50
#26 overall#21 gender
2025
Summer Camp Series - Day 1
3:53:42
#27 overall#23 gender
2013
Rock ‘n’ Roll Philadelphia Half Marathon
1:52:02
#3912 overall#1391 gender
Performance Timeline
Complete Race Log
| Year | Race | State | Time | Place |
|---|---|---|---|---|
| 2025 | Mainly Marathons Prairie SeriesSouth Sioux City | NE | 3:49:50 | #26 |
| 2025 | Summer Camp Series - Day 1Rice | MN | 3:53:42 | #27 |
| 2013 | Rock ‘n’ Roll Philadelphia Half MarathonPhiladelphia | PA | 1:52:02 | #3912 |
States Raced
1 race 2 races 3-4 races 5+ races
State Breakdown
MAMassachusetts
0 races50-State Challenge
1/ 50 states
49 states to go