James Butler
ID 1007203
Born : 1975 Cat. M50 Ultrarunner since 2017 GBR
33
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
49
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 ?GBRUnited Kingdom
66,0%
Rank quotient ?This runner's calculation uses 33 eligible race(s): Σ(rank − 1) = 4 154; Σ finishers = 6 298. 4 154 / 6 298 × 100 = 65.96%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed34
Km — ultra races2 852 km
> 100 km9
> 160 km6
Longest race173,8 km
10th Spine Challenger — 8/1/2022

Km per year (ultra races)

579
6 races
2022
750
8 races
2023
66
1 race
2024
264
2 races
2025
80
1 race
2026

Race types (share of distance)

Trail96,1%
Stage3,9%

Records

50 km5h17'09100 km15h50'3450 mi11h02'17100 mi26h49'29

HISTORY

33 race(s)
DateRacePerf.Rk
2026
11.04 50mi GBR14th South Downs Way 50 Mile Race 11:02:17 h284
2025
14.06 100mi GBR13th South Downs Way 100 Mile Race 27:41:14 h323
17.05 103km GBR8th Ultra-Trail Snowdonia - 100km 27:41:07 h435
2024
03.03 41mi GBR11th The Millennium Way 9:10:40 h45
2023
10.11 100mi GBRDartmoor Way 100mi 33:29:04 h24
06.10 110km GBRNorth Coast 110 km 20:52:41 h12
16.09 50mi GBR8th Chiltern Wonderland 50 11:20:24 h106
28.07 105mi GBRLakeland 100 Mile 36:26:47 h241
08.07 31mi GBR4th Wendover Woods Night 50km 7:36:17 h68
20.05 44mi GBR17th Endurancelife Classic Quarter 11:43:30 h129
08.04 34.6mi GBREndurancelife Pembrokeshire Ultra 6:52:07 h17
18.03 33mi GBREndurancelife Sussex Ultra 8:08:36 h82
2022
26.11 36.6mi GBREndurancelife CTS - Dorset Ultra 9:37:20 h89
06.08 103mi GBR12th North Downs Way 100 Mile Race 28:21:00 h109
21.05 44mi GBR16th Endurancelife CTS - Classic Quarter 10:57:23 h108
30.04 34.6mi GBREndurancelife CTS - Pembrokeshire Ultra 7:02:47 h66
05.02 33.8mi GBREndurancelife CTS - South Devon Ultra 7:47:32 h77
08.01 108mi GBR10th Spine Challenger 2d 09:12:25 h27
2021
13.11 50mi GBRDartmoor Way Granite 50mi 14:28:13 h47
16.10 100mi GBR10th Autumn 100 Mile Race 26:49:29 h144
10.07 50km GBR2nd Wendover Woods Night 50km 7:20:08 h61
12.06 32.4mi GBREndurancelife CTS - Exmoor Ultra 7:39:56 h54
17.04 34.1mi GBREndurancelife CTS - Sussex Ultra 7:55:45 h103
2019
07.12 55mi GBRMontane Cheviot Goat 19:28:54 h214
13.07 100km GBR7th Race to the Stones 100 km Ultramarathon 15:50:34 h499
08.06 45.1mi GBR13th Cornwall Classic Quarter Ultra Marathon 11:22:28 h136
09.03 50km GBRHumanity Direct Amersham Ultra 5:17:09 h49
2018
07.07 70mi/2stages GBRRound The Island Isle of Wight Multistage Ultra 20:25:22 h46
06.05 50km GBR2nd St Illtyds Ultra 50km 8:34:00 h102
03.02 34.9mi GBRCoastal Trail Series - South Devon Ultra 8:07:28 h54
13.01 33.5mi GBRCoastal Trail Series - Anglesey Ultra 7:57:26 h30
2017
17.12 50km GBRPortsmouth Coastal Waterside 50K 5:43:28 h267
16.09 50mi GBR2nd Chiltern Wonderland 50 Mile Race 11:42:55 h139