Justin Walker
ID 70600
Born : 1980 Cat. M45 Ultrarunner since 2006 USA
43
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
53
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
3
Countries visited ?QATQatarRSASouth AfricaUSAUnited States
11,4%
Rank quotient ?This runner's calculation uses 43 eligible race(s): Σ(rank − 1) = 4 940; Σ finishers = 43 188. 4 940 / 43 188 × 100 = 11.44%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed43
Km — ultra races3 924 km
> 100 km12
> 160 km11
Longest race160,9 km
32nd Hardrock Hundred Endurance Run — 11/7/2025

Km per year (ultra races)

2022
161
1 race
2023
311
4 races
2024
161
1 race
2025
2026

Race types (share of distance)

Road8,6%
Trail91,4%

Wins & podiums (ultra)

🏆 Win3
🏆 Win M4
🏅 Top 39
🏅 Top 3 M11
Longest winning streak1
Current streak0

Records

50 km4h09'37100 km12h02'1550 mi7h51'43100 mi20h41'576 h63,25 km

HISTORY

44 race(s) · 2 split(s) nested
DateRacePerf.Rk
2025
11.07 100mi USA32nd Hardrock Hundred Endurance Run 44:51:50 h92
2024
29.09 50km USA4th Sawatch Ascent 50km Race 7:59:38 h64
12.07 100mi USA31st Hardrock Hundred Endurance Run 43:06:33 h71
11.05 50km USA19th Jemez Mountain 50km Trail Run 9:35:39 h112
13.04 50km USA26th Taturs Lake McMurtry 50 km Trail Race 5:44:25 h6
2023
21.07 100mi USA25th Cascade Crest Classic 100 Mile 31:40:24 h70
2021
23.10 50km USA4th Bobcat Trail Race 50k 4:51:12 h3 🥉
18.09 50km USA8th The Barkley Fall Classic 11:07:24 h49
2019
14.06 100mi USA27th Bighorn Mountain Wild & Scenic 100 Mile Trail Run 34:24:45 h168
2018
31.03 56km RSA49th Two Oceans Marathon 4:58:33 h1238
18.03 6h USA11th Six Hour Snake Run 55.924 km6
2017
16.12 100mi USA1st Loup Garou 100 Mile Trail Run 25:40:17 h5
21.10 100mi USA7th Taturs Pumpkin Holler 100 Mile Race 20:41:57 h1 🏆
03.06 50km USA12th War Eagle 50K 4:35:07 h8
29.04 101km USA5th FlatRock 101K Ultra Trail Race 12:29:41 h2 🥈
22.04 50mi USA27th Ouachita Trail 50 Mile 8:25:27 h1 🏆
21.01 50km USA6th Go Short, Go Long, Go Very Long 50K 4:09:37 h5
2016
09.09 100mi USA37th Wasatch Front 100 Mile 32:51:42 h143
14.05 50mi USA5th Quad Rock 50 Mile 12:08:41 h69
30.04 50mi USA3rd Heartland 50 Mile Race 9:11:13 h5
2015
03.10 100mi USA25th Arkansas Traveller 100 21:43:44 h17
22.08 50mi USA11th Lean Horse Ultra-Marathon 50 Mile 8:33:58 h7
21.02 100mi USA2nd Lake Ouachita Vista Trail Endurance 100 Mile Run (LOViT) 25:11:00 h2 🥈
03.01 50mi USA2nd Wild Azalea Trail Challenge 8:25:14 h1 🏆
2014
31.10 50km QATAspire Int'l 6:50 open race 4:27:18 h3 🥉
30.03 100km USA4th Gorge Waterfalls 100k 12:02:15 h9
01.02 50mi USA1st Sean O'Brien 50 Mile Trail Race 9:13:19 h37
2013
16.11 50km USA2nd Mt. Tam Trail Run 4:52:29 h8
24.08 50km USA1st Headwaters Trail Run 50K 5:22:34 h6
27.07 50mi USA15th Siskiyou Out Back 50 Miles Trail Run 7:51:43 h5
02.06 87km road race RSA88th Comrades Marathon - Up Run 7:52:59 h515
18.05 50mi USA20th Bishop High Sierra Ultramarathons 50 Miles 10:24:53 h18
04.05 60km USA18th Miwok 60k Trail race 6:47:06 h59
30.03 56km road race RSA44th Two Oceans Marathon 4:29:10 h533
17.03 6h USA6th Taturs Six Hour Snake Run 63.247 km2 🥈
2012
22.09 50km USA3rd Flagline Trail Fest 50K 6:19:03 h69
14.07 50mi USA14th Siskiyou Out Back 50 Miles Trail Run 10:23:08 h45
23.06 100mi USA39th Western States 100 Mile Endurance Run 23:14:51 h114
03.06 89km road race RSA87th Comrades Marathon - Down Run 8:20:55 h1346
2011
23.04 50km road race RSA42nd Two Oceans Marathon - 50km Split 3:55:07 h449
2010
17.04 50mi USA7th Desert Rats Trail Running Festival 50 Miles 10:57:14 h28
2009
20.06 50mi USA20th Mohican Trail 50 Mile 8:42:49 h3 🥉
2007
10.03 50km USA26th Carl Touchstone Memorial Mississippi Trail 50 km 5:20:05 h5
2006
19.08 100mi USA24th Leadville Trail 100 Mile 23:43:18 h33