William Bacon
ID 388196
Born : 1986 Cat. M40 Ultrarunner since 2012 USA
31
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
40
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
2
Countries visited ?ITAItalyUSAUnited States
36,3%
Rank quotient ?This runner's calculation uses 31 eligible race(s): Σ(rank − 1) = 4 598; Σ finishers = 12 657. 4 598 / 12 657 × 100 = 36.33%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed31
Km — ultra races2 215 km
> 100 km2
> 160 km1
Longest race160,9 km
52nd Western States 100 Mile Endurance Run — 28/6/2025

Km per year (ultra races)

295
4 races
2022
100
1 race
2023
195
3 races
2024
211
2 races
2025
50
1 race
2026

Race types (share of distance)

Trail100,0%

Records

50 km4h48'01100 km13h34'0450 mi9h36'24100 mi26h08'29

HISTORY

31 race(s)
DateRacePerf.Rk
2026
21.03 50km USA3rd The Big Alta 6:45:17 h103
2025
28.06 100mi USA52nd Western States 100 Mile Endurance Run 26:08:29 h128
22.03 50km USA2nd The Big Alta 5:12:29 h65
2024
30.11 28mi USA39th Quad Dipsea Trail Run 6:28:53 h127
27.04 100km USA11th The Canyons Endurance 100 km Run 17:23:45 h274
24.02 50km USA1st The Big Alta 5:06:03 h26
2023
18.02 99.9km USA10th Black Canyon Trail 100 km Run 15:28:59 h425
2022
26.08 101km ITA16ème Courmayeur-Champex-Chamonix 19:53:10 h751
18.06 48km USA7th The Broken Arrow Skyrace 7:19:47 h164
23.04 95.9km USA9th The Canyons Endurance 100 km Run 15:03:09 h195
12.03 50km USA10th Marin Ultra Challenge 50 km Race 5:06:47 h30
2019
20.07 50mi USA18th Tahoe Rim Trail 50M Endurance Run 13:14:08 h83
04.05 100km USA24th Miwok 100k Trail Race 13:52:06 h135
13.04 50mi USA11th Lake Sonoma 50 Mile Race 11:28:55 h160
09.03 50km USA8th Marin Ultra Challenge 50 km Race 5:33:14 h60
2018
05.05 100km USA23nd Miwok 100k Trail Race 13:34:04 h128
14.04 50mi USA10th Lake Sonoma 50 Mile Race 11:08:01 h150
10.03 50km USA7th Marin Ultra Challenge 50 km Race 4:48:01 h17
2017
15.04 50mi USA9th Lake Sonoma 50 Mile Race 11:11:17 h145
11.03 50km USA6th Marin Ultra Challenge 50 km Race 5:29:48 h46
2016
02.04 50mi USA37th American River 50 Mile Endurance Run 10:38:28 h185
12.03 50km USA5th Marin Ultra Challenge 50 km Race 5:33:32 h60
2015
02.05 100km USA20th Miwok 100k Trail Race 13:40:00 h146
04.04 50mi USA36th American River 50 Mile Endurance Run 10:13:56 h204
14.03 50km USA4th Marin Ultra Challenge 50 km Race 6:15:16 h56
2014
03.08 50km USA33rd Skyline 50k Endurance Run 5:16:47 h48
05.04 50mi USA35th American River 50 Mile Endurance Run 9:36:24 h205
08.03 50km USA25th Way Too Cool 50K Endurance Run 5:14:09 h214
2013
07.12 50km USA7th Endurance Challenge - California Trail 50 km 5:49:03 h64
09.03 50km USA24th Way Too Cool 50K Endurance Run 5:04:01 h175
2012
25.08 31.5mi USA13th Tamalpa Headlands 50K 5:57:34 h60