William Shirk
ID 20376
Born : 1945 Cat. M80 Ultrarunner since 1998 USA
30
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
1
Countries visited ?USAUnited States
76,7%
Rank quotient ?This runner's calculation uses 30 eligible race(s): Σ(rank − 1) = 1 172; Σ finishers = 1 529. 1 172 / 1 529 × 100 = 76.65%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed30
Km — ultra races2 069 km
> 100 km3
> 160 km1
> 24h4
Longest race160,9 km
1st Heartland 100 Mile Race — 14/10/2000

Km per year (ultra races)

2022
2023
2024
2025
2026

Race types (share of distance)

Road20,9%
Trail79,1%

Wins & podiums (ultra)

🏆 Win0
🏆 Win M0
🏅 Top 31
🏅 Top 3 M1
Longest winning streak0
Current streak0

Records

50 km6h07'1450 mi10h53'35100 mi30h00'0024 h127,20 km

HISTORY

30 race(s)
DateRacePerf.Rk
2007
15.09 32mi USA13th Bohemian Alps 50 km Ultramarathon 8:09:00 h28
2006
14.10 50mi USA7th Heartland 50 Mile Race 16:14:57 h40
05.03 50km USAA-OK Trail Run 7:22:54 h15
08.01 50km USA6th Bandera 50 km Ultratrail 8:53:22 h73
2005
17.06 50km USA14th Bighorn Mountain Wild & Scenic 50km Trail Run 9:46:41 h94
08.01 50km USA5th Bandera 50 km Ultratrail 8:28:10 h74
2004
25.09 50km USA10th Flatrock 50K 9:32:36 h32
10.01 50km USA4th Bandera 50 km Ultratrail 7:36:34 h28
2003
13.09 50mi USA9th Bohemian Alps 50 Miles 12:04:53 h17
26.04 50km USA1st Ad Astra per Ultra - 50 km Run 6:07:14 h3 🥉
08.02 50km USA9th East Texas Ultra Runners 50K 7:49:04 h40
2002
27.04 24h USA6th KUS 24 Hour Ultramarathon 77.248 km6
06.04 50mi USA4th Rockin-K Trail 50 Mile 11:27:20 h25
09.02 50km USA8th East Texas Ultra Runners 50K 6:46:40 h34
2001
24.11 24h USA2nd Ultracentric 24 Hour Run 117.594 km12
26.05 50mi USA2nd Berryman 50 Mile 12:32:15 h5
07.04 50mi USA7th Umstead Endurance Run 50 Miles 13:04:01 h79
2000
25.11 24h USA1st Ultracentric 24 Hour Run 60.784 km19
14.10 100mi USA1st Heartland 100 Mile Race 30:00:00 h22
30.09 50km USA6th Flatrock 50K 7:45:41 h29
15.07 50km USAElkhorn Mountain Endurance Run 50 km 6:46:52 h22
29.04 24h USA4th KUS 24 Hour Ultramarathon 127.202 km5
18.03 50km USA14th Crown King Scramble 50K 7:39:37 h143
19.02 50km USA8th Sylamore Trail 50k Run 7:30:58 h54
1999
28.08 50mi USAFairfield Trail Runs - 50 miles 11:06:30 h7
01.05 50km USA1st Lake McMurtry 50 km Trail Race 7:28:54 h18
03.04 50mi USA1st Rockin-K Trail 50 Mile 11:21:00 h5
20.03 50mi USA18th Cross Timbers Trail Run 11:50:55 h44
1998
12.12 50mi USA9th Sunmart Texas Trails 50 Mile 10:53:35 h205
26.09 50km USA4th Flatrock 50K 8:16:59 h24