Kaz Williams
Born : 1972 Cat. W50 Ultrarunner since 2011 GBR
24
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
60
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
4
Countries visited ?FRAFranceITAItalySUISwitzerlandUSAUnited States
50,2%
Rank quotient ?This runner's calculation uses 24 eligible race(s): Σ(rank − 1) = 4 788; Σ finishers = 9 536. 4 788 / 9 536 × 100 = 50.21%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed24
Km — ultra races4 393 km
> 100 km17
> 160 km9
> 200 km5
Longest race676,2 km

Km per year (ultra races)

160
1 race
2022
710
3 races
2023
2024
330
1 race
2025
2026

Race types (share of distance)

Road26,8%
Trail73,2%

Wins & podiums (ultra)

🏆 Win0
🏆 Win F2
🏅 Top 30
🏅 Top 3 F7
Longest winning streak0
Current streak0

HISTORY

24 race(s)
DateRacePerf.Rk
2025
14.09 330km ITA16° TOR330 - Tor des Géants 6d 04:09:50 h705
2023
13.07 500km USA18th Last Annual Vol-State 500K Endurance Run 6d 21:11:11 h35
13.05 50mi USA20th PCT 50 Mile Trail Run 13:00:11 h72
29.04 130km USA11th Badwater Salton Sea 26:23:00 h46
2022
12.08 160km SUI5. Swiss Alps 100 - 100mi 39:58:01 h37
2021
28.12 10d USA37th Across the Years, 10 days 676.165 km8
2019
10.09 130km ITA3° Tot Dret 32:22:44 h30
26.07 102mi USA6th Ouray 100 Mile Endurance Run 43:23:53 h12
27.04 80km FRA9ème Ultra Beaujolais Villages Trail 11:45:44 h46
2018
12.10 238mi USA2nd Moab 240 Endurance Run 3d 08:38:19 h16
21.07 105km FRA10ème Ultra Tour du Beaufortain 19:25:33 h120
2017
08.09 202mi USA4th Tahoe 200 Mile Endurance Run 3d 05:15:24 h22
17.06 83km FRA5ème Samoëns Trail Tour - Ultra Tour du Haut Giffre 17:31:16 h101
13.05 121km FRAChallenge du Val de Drome 121km 25:50:27 h31
2016
10.09 100mi USA7th Pine to Palm 100 Mile Endurance Run 27:12:09 h29
31.07 61km FRA8éme Tour des Fiz – Huit Refuges 11:44:15 h88
23.04 120km FRAUltra du Pas du Diable 120 km 23:25:34 h80
2015
31.10 100mi USA13th Javelina Jundred 100 Mile Endurance Run 25:47:18 h144
26.08 119km ITA6ème Sur les Traces des Ducs de Savoie 25:32:19 h323
2014
29.08 168km FRA12ème Ultra Trail Tour du Mont Blanc 42:23:54 h947
2013
29.08 119km ITA4ème Sur les Traces des Ducs de Savoie 26:20:14 h329
28.06 80km FRA1ère 80km du Mont-Blanc 18:14:59 h211
2012
31.08 86km ITA7ème Courmayeur-Champex-Chamonix 20:02:51 h910
2011
25.09 50km FRATrail des Aiguilles Rouges 12:41:30 h470