Seth Thomas
ID 1247166
Born : 1989 Cat. M35 Ultrarunner since 2019 USA
44
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
50
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
61,9%
Rank quotient ?This runner's calculation uses 44 eligible race(s): Σ(rank − 1) = 4 147; Σ finishers = 6 701. 4 147 / 6 701 × 100 = 61.89%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed44
Km — ultra races3 183 km
> 100 km10
> 160 km3
> 24h11
Longest race160,9 km
31st Umstead Endurance Run 100 Miles — 28/3/2026

Km per year (ultra races)

445
6 races
2022
425
5 races
2023
512
8 races
2024
686
10 races
2025
670
9 races
2026

Race types (share of distance)

Road37,7%
Trail62,3%

Records

50 km5h47'3350 mi13h58'37100 mi26h10'2224 h131,78 km

HISTORY

44 race(s)
DateRacePerf.Rk
2026
19.09 50km trail race USA18th Grindstone 50 km 8:33:20 h313
25.04 50km USA26th Promise Land 50K++ 8:38:20 h239
18.04 52mi USA10th Blue Ridge Double Marathon 11:56:08 h48
28.03 100mi USA31st Umstead Endurance Run 100 Miles 26:10:22 h90
21.03 50km USA19th Terrapin Mountain 50 km Race 7:27:32 h60
14.03 50km USA12th The Pistol 50 km Ultra Run 5:47:33 h41
07.03 24h USA13th Crooked Road 24 Hour Ultra 125.590 km12
14.02 50km USA31st Holiday Lake 50K++ 7:33:58 h100
03.01 50km USA27th Salem Lakeshore Frosty Fifty 6:38:09 h74
2025
28.12 24h USA41st Across the Years, 24h 81.753 km37
06.12 9h USA1st Cape Fear Hoilday Run 54.653 km17
01.11 50km USA43rd Mountain Masochist 50km Trail Run 9:10:04 h57
27.09 24h USA19th Hinson Lake 24 Hour Ultra Classic 53.221 km154
20.09 50km USA17th Grindstone 50 km 8:05:54 h159
26.04 50km USA25th Promise Land 50K++ 9:04:23 h256
12.04 52mi USA9th Blue Ridge Double Marathon 11:48:54 h36
05.04 50mi USA30th Umstead Endurance Run 50 Miles 13:58:37 h84
08.03 24h USA12th Crooked Road 24 Hour Ultra 131.784 km8
15.02 50km USA30th Holiday Lake 50K++ 7:35:39 h85
2024
07.12 50km USA6th Freight Train 50km Trail Run 6:13:39 h49
28.09 24h USA18th Hinson Lake 24 Hour Ultra Classic 53.221 km205
21.09 50km USA16th Grindstone 50 km 7:54:08 h112
31.08 30mi USA19th Iron Mountain 30 Mile Trail Run 6:56:46 h46
20.04 50km USA24th Promise Land 50K++ 8:12:08 h205
06.04 100mi USA29th Umstead Endurance Run 100 Miles 26:23:19 h104
16.03 50km USA17th Terrapin Mountain 50 km Race 7:15:07 h60
17.02 50km USA29th Holiday Lake 50K++ 6:26:07 h86
2023
04.11 50km USA41st Mountain Masochist 50km Trail Run 9:05:22 h44
30.09 24h USA17th Hinson Lake 24 Hour Ultra Classic 114.162 km25
01.04 100mi USA28th Umstead Endurance Run 100 Miles 29:13:11 h117
18.03 50km USA16th Terrapin Mountain 50 km Race 8:07:18 h103
18.02 50km USA28th Holiday Lake 50K++ 6:50:23 h95
2022
19.11 24h USA11th Crooked Road 24 Hour Ultra 104.773 km26
05.11 50km USA40th Mountain Masochist 50km Trail Run 7:14:12 h34
30.09 36h USA4th Buffalo Mountain Endurance 36 Hour Run 106.619 km14
23.04 50km USA22th Promise Land 50K++ 8:39:49 h219
16.04 52mi USA6th Blue Ridge Double Marathon 12:18:37 h46
19.03 50km USA15th Terrapin Mountain 50 km Race 7:44:47 h118
2021
20.11 24h USA10th Crooked Road 24 Hour Ultra 104.510 km31
01.10 36h USA3rd Buffalo Mountain Endurance 36 Hour Run 108.630 km17
24.04 50km USA21th Promise Land 50K++ 8:20:25 h234
2020
15.02 50km USA25th Holiday Lake 50K++ 6:22:32 h146
2019
23.11 24h USA9th Crooked Road 24 Hour Ultra 81.519 km44
16.02 50km USA24th Holiday Lake 50K++ 7:32:47 h141