James Kern
ID 346128
Born : 1958 Cat. M65 Ultrarunner since 2011 USA
37
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
50
DUV-index+ ?Largest integer N such that the race distances provide at least N complete segments of N km in total. A single long race may therefore contribute several segments. See the DUV-Index tab for the detailed calculation. calculation details
1
Countries visited ?USAUnited States
31,5%
Rank quotient ?This runner's calculation uses 37 eligible race(s): Σ(rank − 1) = 1 748; Σ finishers = 5 549. 1 748 / 5 549 × 100 = 31.50%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed37
Km — ultra races3 113 km
> 100 km6
> 160 km5
> 200 km1
> 24h1
Longest race217,3 km
27th Badwater Ultramarathon — 15/7/2013

Km per year (ultra races)

326
4 races
2022
80
1 race
2023
311
4 races
2024
2025
50
1 race
2026

Race types (share of distance)

Road8,6%
Trail91,4%

Wins & podiums (ultra)

🏆 Win1
🏆 Win M2
🏅 Top 36
🏅 Top 3 M7
Longest winning streak1
Current streak0

Records

50 km5h35'50100 km12h05'2050 mi8h59'33100 mi20h52'506 h51,34 km24 h100,26 km

HISTORY

37 race(s)
DateRacePerf.Rk
2026
20.06 50km USA8th Golden State 50K 6:53:12 h56
2024
02.11 100mi USA24th Rio Del Lago 100 Mile Endurance Run 26:19:05 h92
13.07 50km USA15th San Lorenzo River Trail Run 7:34:22 h33
21.04 50km USA13th Horseshoe Lake 50 km Trail Run 7:28:15 h11
24.02 50km USA9th Salmon Falls 50 km Race 6:51:10 h103
2023
01.04 50mi USA43th American River 50 Mile Endurance Run 11:26:40 h104
2022
14.05 100km USA39th Quicksilver 100 km Endurance Run 15:32:57 h83
23.04 95.9km USA9th The Canyons Endurance 100 km Run 16:41:08 h282
02.04 50mi USA42th American River 50 Mile Endurance Run 10:43:25 h45
26.02 50km USA7th Salmon Falls 50 km Race 6:21:15 h70
2021
31.12 6h USA11th New Years One Day 6 Hour Run 51.338 km11
18.12 50km USA10th Woodside Ramble 50K - Winter 6:20:15 h56
2020
14.03 50mi USA7th Pioneer Spirit 50M 11:37:20 h45
18.01 50km USA14th Fremont Fat Ass 50k 5:36:00 h23
2019
02.11 50km USA17th Woodside Trail Run 50K 6:31:48 h22
2018
20.10 50km USASaratoga Trail Run 50km 6:51:25 h24
07.04 50mi USA39th American River 50 Mile Endurance Run 10:30:25 h84
2017
18.11 50km USA15th Woodside Trail Run 50K 5:59:32 h15
22.04 24h USA5th Razorback 24 hour Endurance Race 100.262 km8
01.04 50mi USA38th American River 50 Mile Endurance Run 9:39:01 h81
2016
15.10 50km USA3rd Overlook Endurance Run 50K 5:38:47 h36
21.08 100km USA6th Run-de-Vous 100 km Endurance Run 12:11:11 h2 🥈
12.06 50km USA5th Big Basin - Skyline to the Sea 50 km 5:35:50 h18
02.04 50mi USA37th American River 50 Mile Endurance Run 9:13:29 h74
2015
15.08 100km USA5th Run-de-Vous 100 km Endurance Run 12:50:40 h2 🥈
04.04 50mi USA36th American River 50 Mile Endurance Run 9:17:52 h107
28.02 100km USA3rd Razorback 100 km Endurance Race 12:23:58 h1 🏆
2014
16.08 100km USA4th Run-de-Vous 100 km Endurance Run 12:05:20 h2 🥈
05.04 50mi USA35th American River 50 Mile Endurance Run 8:59:33 h126
2013
23.11 50mi USA4th The Spirit of Rock 50M 10:39:13 h27
15.07 135mi USA27th Badwater Ultramarathon 33:57:30 h22
2012
29.12 100mi USA1st Houston Hundred 100 Mile Ultra 20:52:50 h3 🥉
15.12 50km USA1st Woodside Ramble 50K - Winter 6:07:01 h39
10.11 100mi USA1st Run D'Amore 100M Endurance Run 22:44:01 h4
03.11 100mi USA3rd Coyote Springs 100 Mile Trail Run - Fall edition 27:18:35 h3 🥉
15.09 50mi USA6th Headlands Hundred 50 Mile Endurance Run 11:40:32 h34
2011
26.03 50km USA10th Woodside Trail Run 50K 6:32:24 h37