Jonathan Klaassen (M43)
2026
2 Races | 162 mi.Bay Area 100
Jun 13th 2026
| Oakland, CA
Distance
100 Miles
Overall
15
/ 102
Division (M)
13
/ 76
22:48:12
Sean O'Brien 100k/50M/50k
Jan 31st 2026
| Malibu, CA
Distance
100 KM
Overall
35
/ 84
Division (M)
25
/ 65
14:23:07
2022
2 Races | 81 mi.Dick Collins Firetrails
Sep 24th 2022
| Castro Valley, CA
Distance
50 Miles
Overall
36
/ 96
Division (M)
28
/ 64
11:50:08
Skyline 50K
Aug 6th 2022
| San Leandro, CA
Distance
50 KM
Overall
90
/ 197
Division (M)
63
/ 121
6:52:44
2019
1 Race | 31 mi.Skyline 50K
Aug 4th 2019
| San Leandro, CA
Distance
50 KM
Overall
40
/ 167
Division (M)
32
/ 100
5:35:44
2018
1 Race | 50 mi.Pioneer Spirit 50
Jul 28th 2018
| Folsom, CA
Distance
50 Miles
Overall
19
/ 46
Division (M)
13
/ 33
10:40:43
2017
1 Race | 50 mi.Dick Collins Firetrails
Oct 7th 2017
| Castro Valley, CA
Distance
50 Miles
Overall
16
/ 64
Division (M)
13
/ 41
11:12:12
7
Races
8y 8m 11d
Longevity
374
Lifetime Miles
Personal Bests
50k
(2)
5:35:44
2019
50m
(3)
10:40:43
2018
100k
(1)
14:23:07
2026
100m
(1)
22:48:12
2026
Distance by Year
2026
162
Miles
2 Races
2022
81
Miles
2 Races
2019
31
Miles
1 Race
2018
50
Miles
1 Race
2017
50
Miles
1 Race