Sarah O'brien (F31)
2026
1 Race | 62 mi.Sean O'Brien 100k/50M/50k
Jan 31st 2026
| Malibu, CA
Distance
100 KM
Overall
14
/ 84
Division (F)
5
/ 19
13:00:44
2025
1 Race | 62 mi.Canyons Endurance Runs
Apr 25th 2025
| Auburn, CA
Distance
100 KM
Overall
98
/ 526
Division (F)
21
/ 113
12:58:40
2024
3 Races | 155 mi.Kodiak Ultra Marathons
Oct 11th 2024
| Big Bear Lake, CA
Distance
100 KM
Overall
34
/ 284
Division (F)
11
/ 61
11:52:17
mammoth trailfest.
Sep 21st 2024
| Mammoth Lakes, CA
Distance
50 KM
Overall
86
/ 539
Division (F)
15
/ 195
6:30:43
Miwok
May 4th 2024
| Stinson Beach, CA
Distance
100 KM
Overall
18
/ 222
Division (F)
4
/ 61
11:26:00
2023
2 Races | 100 mi.Golden Gate Spartan Trail Classic
Nov 18th 2023
| San Francisco, CA
Distance
50 Miles
Overall
7
/ 71
Division (F)
2
/ 10
8:58:24
Marin Ultra Challenge
Jun 3rd 2023
| Sausalito, CA
Distance
50 Miles
Overall
22
/ 112
Division (F)
2
/ 17
9:33:08
2022
1 Race | 31 mi.Mt. Tam Trail Run
Nov 12th 2022
| Stinson Beach, CA
Distance
50 KM
Overall
14
/ 104
Division (F)
3
/ 30
5:55:44
8
Races
3y 2m 21d
Longevity
411
Lifetime Miles
Personal Bests
50k
(2)
5:55:44
2022
50m
(2)
8:58:24
2023
100k
(4)
11:26:00
2024
Distance by Year
2026
62
Miles
1 Race
2025
62
Miles
1 Race
2024
155
Miles
3 Races
2023
100
Miles
2 Races
2022
31
Miles
1 Race
Multiple Performances
2nd Place
8:58:24
50 Miles
2nd Place
9:33:08
50 Miles
3rd Place
5:55:44
50 KM
Achievements are awarded for races with 25 or more finishers and courses with 200 or more finishers.
Masters: 40-49 / Grand Masters: 50-59 / Senior Grand Masters: 60+