Mark Williams
ID 5016
Born : 1965 Cat. M60 Ultrarunner since 1991 GBR
53
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
80
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
6
Countries visited ?GBRUnited KingdomGERGermanyGREGreeceMARMoroccoSGPSingaporeUSAUnited States
30,7%
Rank quotient ?This runner's calculation uses 67 eligible race(s): Σ(rank − 1) = 2 516; Σ finishers = 8 206. 2 516 / 8 206 × 100 = 30.66%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed72
Km — ultra races9 557 km
> 100 km41
> 160 km35
> 200 km16
> 24h7
> 48h2
Longest race249,2 km
14th Across the Years, 48h — 30/12/1996

Km per year (ultra races)

2022
2023
2024
2025
2026

Race types (share of distance)

Road16,0%
Trail79,6%
Stage2,5%
Elim.1,8%

Wins & podiums (ultra)

🏆 Win7
🏆 Win M7
🏅 Top 313
🏅 Top 3 M13
Longest winning streak2
Current streak0

Records

50 km4h01'1750 mi7h39'40100 mi21h10'5112 h81,18 km24 h193,93 km48 h249,20 kmBackyard26 loops

HISTORY

67 race(s) · 1 split(s) nested
DateRacePerf.Rk
2021
06.11 100mi USA21st Rio Del Lago 100 Mile Endurance Run 28:37:45 h196
2019
26.10 100mi USA17th Javelina Jundred 100 Mile Endurance Run 23:42:06 h149
2018
27.10 100mi USA16th Javelina Jundred 100 Mile Endurance Run 25:09:09 h159
2017
28.10 100mi USA15th Javelina Jundred 100 Mile Endurance Run 24:40:51 h125
2016
25.06 100mi USA43rd Western States 100 Mile Endurance Run 27:54:12 h162
2015
31.10 100mi USA13th Javelina Jundred 100 Mile Endurance Run 23:51:24 h111
2014
21.06 153km GBR30th West Highland Way Race 27:33:52 h113
2013
19.10 Backyard Ultra USA3rd Big Dog's Backyard Ultra 174.356 km (26h)6
14.09 50mi USA7th Headlands Hundred 50 Mile Endurance Run 9:54:07 h34
11.05 50km USA30th Quicksilver 50 km Endurance Run 6:42:24 h58
2012
27.10 24h USA4th 24H The Hard Way 185.718 km2 🥈
13.10 50km SGPThe North Face 50 Singapore 4:01:17 h1 🏆
15.09 50mi USA6th Headlands Hundred 50 Mile Endurance Run 10:15:15 h18
2011
22.10 24h USA3rd 24H The Hard Way 180.584 km3 🥉
08.10 50mi USA29th Dick Collins Firetrails 50 Mile 9:20:33 h52
2010
04.12 50km USA9th Woodside Trail Run 50K 5:54:07 h20
2009
05.12 50km USA8th Woodside Trail Run 50K 6:22:32 h71
12.09 50km USA3rd Paatuwaqatsi Run 7:02:00 h16
2008
26.09 245.3km GRE26. Spartathlon 35:42:41 h125
03.08 50km USA27th Skyline 50k Endurance Run 4:40:29 h14
2007
20.05 50km USA20th Ohlone 50K Wilderness Run 6:13:15 h34
03.02 50km USA6th Woodside Trail Run 50K 4:51:10 h11
2006
24.06 100mi USA33th Western States 100 Mile Endurance Run 25:40:09 h66
2005
30.09 245.3km GRE23. Spartathlon 33:07:55 h35
25.06 100mi USA32th Western States 100 Mile Endurance Run 21:55:05 h50
22.05 50km USA18th Ohlone 50K Wilderness Run 5:36:20 h5
2004
01.10 245.3km GRE22. Spartathlon 32:38:49 h19
26.06 100mi USA31th Western States 100 Mile Endurance Run 21:14:04 h29
22.05 50km USA2nd Carmel Valley 50K 5:26:30 h2 🥈
08.05 50mi USA21st Quicksilver 50 Mile Endurance Run 7:55:35 h6
2003
27.09 72mi USA8th Tahoe Midnight Express Ultra 72 Mile 12:58:12 h1 🏆
28.06 100mi USA30th Western States 100 Mile Endurance Run 26:22:25 h131
10.05 50mi USA20th Quicksilver 50 Mile Endurance Run 7:48:10 h3 🥉
06.04 243km/6stages MAR18. Marathon des Sables 33:41:06 h135
22.03 50km USA2nd Pirates Cove Trail Run 5:09:55 h2 🥈
2002
28.09 72mi USA7th Tahoe Midnight Express Ultra 72 Mile 12:41:02 h1 🏆
27.09 245.3km GRE20. Spartathlon 34:42:14 h53
2001
28.09 245.3km GRE19. Spartathlon 33:27:02 h32
23.06 100mi USA28th Western States 100 Mile Endurance Run 21:34:11 h30
12.05 50mi USA18th Quicksilver 50 Mile Endurance Run 7:43:54 h4
2000
29.09 245.3km GRE18. Spartathlon 33:59:24 h46
1999
24.09 245.3km GRE17. Spartathlon 32:44:37 h15
28.08 12h USA7th DSE Distance Classic 12 Hour 81.175 km15
26.06 100mi USA26th Western States 100 Mile Endurance Run 21:10:51 h19
08.05 50mi USA16th Quicksilver 50 Mile Endurance Run 7:39:40 h3 🥉
1998
25.09 245.3km GRE16. Spartathlon 32:54:48 h28
01.08 50km USA17th Skyline 50k Endurance Run 4:21:38 h7
09.05 50km USA15th Quicksilver 50 km Endurance Run 5:44:37 h60
1997
26.09 245.3km GRE15. Spartathlon 35:37:00 h63
19.07 24h USA2nd Jim Skophammer/BAUR 24 Hour 162.141 km9
11.07 100mi USA5th Hardrock Hundred Endurance Run 39:29:50 h15
10.05 50mi USA14th Quicksilver 50 Mile Endurance Run 8:27:53 h7
1996
30.12 48h USA14th Across the Years, 48h 249.200 km1 🏆
27.09 245.3km GRE14. Spartathlon 33:58:00 h29
03.08 50km USA15th Skyline 50k Endurance Run 5:10:39 h42
22.07 24h USA1st Jim Skophammer/BAUR 24 Hour 193.925 km1 🏆
30.03 60mi USA2nd The Barkley Marathons 60 Mile Fun Run 35:00:00 h1 🏆
1995
29.09 245.3km GRE13. Spartathlon 33:06:30 h23
14.07 48h GER2. 48-Stunden-Self-Transcendence-Lauf Köln 235.844 km20
01.04 100mi USA1st The Barkley Marathons 100 Mile 2d 11:28:00 h1 🏆
1994
17.12 50mi GBR12th Rowbotham's Round Rotherham 8:41:35 h22
23.09 245.3km GRE12. Spartathlon 32:41:00 h11
18.06 120km GBR10th West Highland Way Race 15:33:00 h5
1993
18.12 78km GBR11th Rowbotham's Round Rotherham 8:28:41 h12
24.09 245.3km GRE11. Spartathlon 34:50:26 h33
1992
20.06 153km GBR8th West Highland Way Race 20:24:30 h4
1991
06.07 153km GBR7th West Highland Way Race 26:56:53 h7