Alex Sox-Harris
ID 27229
Born : 1963 Cat. M60 Ultrarunner since 2002 USA
28
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
71,7%
Rank quotient ?This runner's calculation uses 28 eligible race(s): Σ(rank − 1) = 2 054; Σ finishers = 2 863. 2 054 / 2 863 × 100 = 71.74%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed28
Km — ultra races2 137 km
> 100 km3
> 160 km3
Longest race160,9 km
6th Tahoe Rim Trail 100M Endurance Runs — 21/7/2007

Km per year (ultra races)

2022
2023
2024
50
1 race
2025
2026

Race types (share of distance)

Road3,8%
Trail96,2%

Wins & podiums (ultra)

🏆 Win0
🏆 Win M0
🏅 Top 30
🏅 Top 3 M2
Longest winning streak0
Current streak0

Records

50 km6h04'03100 km13h53'4050 mi9h34'08100 mi27h26'32

HISTORY

28 race(s)
DateRacePerf.Rk
2025
22.02 50km USA10th Salmon Falls 50 km Race 8:53:18 h229
2012
13.10 50mi USA30th Dick Collins Firetrails 50 Mile 12:43:59 h233
2008
11.10 50mi USA26th Dick Collins Firetrails 50 Mile 11:28:17 h124
02.02 50km USA7th Woodside Trail Run 50K 6:12:06 h39
2007
21.07 100mi USA6th Tahoe Rim Trail 100M Endurance Runs 32:17:11 h51
20.05 50km USA20th Ohlone 50K Wilderness Run 7:48:11 h102
12.05 50km USA24th Quicksilver 50 km Endurance Run 6:21:01 h58
29.04 50mi USA5th Diablo Endurance Run 14:24:18 h57
2006
07.10 50mi USA24th Dick Collins Firetrails 50 Mile 11:48:31 h132
2005
22.10 100mi USA4th San Diego 100 Mile Endurance Run 29:19:40 h33
03.09 50mi USA1st Grand Teton Races 50 Miles 12:49:20 h5
13.08 50km USA4th Big Basin Redwoods Trail Run 6:48:47 h18
16.07 50mi USA4th Tahoe Rim Trail 50M Endurance Runs 12:19:37 h62
30.04 100km USA10th Miwok 100k Trail race 13:53:40 h172
20.03 50km USA4th Stevens Creek Striders 50K 7:19:18 h46
05.02 50km USA4th Woodside Trail Run 50K 6:09:30 h44
2004
09.10 50mi USA22nd Dick Collins Firetrails 50 Mile 10:36:40 h72
11.09 50km USA1st Pacifica 50 km Trail Run 6:54:45 h7
26.06 100mi USA31th Western States 100 Mile Endurance Run 27:26:32 h154
16.05 50km USA17th Ohlone 50K Wilderness Run 7:12:14 h51
08.05 50km USA21st Quicksilver 50 km Endurance Run 6:04:03 h34
01.05 100km USA9th Miwok 100k Trail race 14:23:17 h158
07.02 50km USA3rd Woodside Trail Run 50K 6:07:30 h36
2003
11.10 50mi USA21st Dick Collins Firetrails 50 Mile 11:18:45 h107
09.08 50mi USA8th Resurrection Pass 50 Mile Ultra Trail Race 10:54:44 h6
19.04 50mi USA17th Ruth Anderson Ultra 50mi 9:34:08 h5
08.02 50km USA2nd Woodside Trail Run 50K 6:12:04 h30
2002
05.10 50km USA1st Big Basin Redwoods Trail Run 6:49:27 h17