Thomas Jackson
ID 15854
Born : 1960 Cat. M65 Ultrarunner since 1980 USA
58
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
91
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
3
Countries visited ?CANCanadaGREGreeceUSAUnited States
45,8%
Rank quotient ?This runner's calculation uses 58 eligible race(s): Σ(rank − 1) = 1 919; Σ finishers = 4 192. 1 919 / 4 192 × 100 = 45.78%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed58
Km — ultra races11 541 km
> 100 km49
> 160 km48
> 200 km17
> 24h10
> 48h10
Longest race676,2 km
37th Across the Years, 6 days — 28/12/2021

Km per year (ultra races)

246
1 race
2022
565
1 race
2023
266
1 race
2024
322
2 races
2025
161
1 race
2026

Race types (share of distance)

Road36,5%
Trail63,5%

Wins & podiums (ultra)

🏆 Win9
🏆 Win M10
🏅 Top 315
🏅 Top 3 M17
Longest winning streak2
Current streak0

Records

100 km16h11'1350 mi7h24'19100 mi17h51'1012 h100,95 km48 h309,18 km6 d676,17 km

HISTORY

59 race(s)
DateRacePerf.Rk
2026
20.06 100mi USA8th Strawberry Field Forever 100 Mile Trail Race 23:49:01 h2 🥈
2025
21.03 100mi USA15th Badger Mountain 100 Mile Challenge 28:46:19 h32
15.02 100mi USA12th Jackpot Ultra Running Festival 100 Mile Race 21:37:47 h5
2024
14.03 48h USA13th Pulse Endurance Runs (Pickled Feet) 48 Hour 265.541 km3 🥉
2023
15.06 351mi USA4th The Last Annual Heart of the South Road Race 5d 11:21:06 h2 🥈
2022
30.09 246km GRE39. Spartathlon 36:10:35 h182
2021
28.12 6d USA37th Across the Years, 6 days 676.165 km2 🥈
24.09 246km GRE38. Spartathlon 35:24:09 h139
28.05 150mi USA10th Pigtails Challenge 150 Mile 37:19:58 h1 🏆
26.03 100mi USA11th Badger Mountain 100 Mile Challenge 27:36:42 h43
2020
20.11 48h USA8th Icarus Florida 48 Hour UltraFest 198.770 km3 🥉
18.06 326mi USA1st The Last Annual Heart of the South Road Race 6d 06:31:04 h6
2019
28.12 48h USA35th Across the Years, 48h 281.598 km1 🏆
26.09 72h USA2nd Crazy Owl Endurance Challenge 72 Hour 380.207 km1 🏆
29.03 100mi USA9th Badger Mountain 100 Mile Challenge 23:56:26 h34
2018
28.09 246km GRE36. Spartathlon 35:34:18 h209
01.06 100mi USA5th Scout Mountain 100 Mile Ultra Trail 32:54:54 h21
2017
30.12 48h USA33rd Across the Years, 48h 309.178 km1 🏆
16.06 100mi USA25th Bighorn Mountain Wild & Scenic 100 Mile Trail Run 32:35:40 h129
28.04 100mi USA7th Salt Flats 100 Mile 23:33:34 h10
2016
07.10 120mi USA2nd Bigfoot 120mi Endurance Run 46:09:54 h21
10.09 100mi USA7th Pine to Palm 100 Mile Endurance Run 30:52:08 h65
24.03 48h USA5th Pulse Endurance Runs (Pickled Feet) 48 Hour 303.499 km1 🏆
2015
14.08 120mi CAN6th Fat Dog 120 Mile Trail Race 41:47:28 h57
22.05 150mi USA4th Pigtails Challenge 150 Mile 34:27:35 h1 🏆
2014
30.12 48h USA30th Across the Years, 48h 234.838 km1 🏆
20.06 100mi USABighorn Mountain Wild & Scenic 100 Mile Trail Run 28:56:22 h67
22.03 50mi USA5th Mesquite Canyon 50 Mile 13:51:51 h16
2013
23.08 100mi USA1st Rampage the Roots - 100mi 33:36:00 h10
24.05 150mi USA2nd Pigtails Challenge 150 Mile 35:59:00 h4
22.03 100mi USA8th Antelope Island Buffalo Run 100 Mile 22:05:10 h14
2012
06.10 100mi USA2nd Yellowstone-Teton 100 Mile Endurance Run 21:17:06 h4
15.06 100mi USA21st Bighorn Mountain Wild & Scenic 100 Mile Trail Run 27:54:54 h42
01.04 44.4mi USA12th Brew to Brew 44.4 mile 9:19:34 h57
2011
30.12 48h USA28th Across the Years, 48h 302.421 km1 🏆
25.03 100mi USA1st Badger Mountain 100 Mile Challenge 24:39:00 h5
2010
11.09 100mi USA9th Plain 100 Mile Endurance Run 32:21:00 h6
18.06 100mi USA19th Bighorn Mountain Wild & Scenic 100 Mile Trail Run 29:39:50 h48
2009
25.09 100mi USA11th The Bear 100 Mile Endurance Run 27:17:17 h17
27.06 100mi USA36th Western States 100 Mile Endurance Run 26:16:19 h94
16.05 12h USA5th Watershed Preserve 12 Hr Trail Race 96.319 km12
2008
13.09 100mi USA7th Plain 100 Mile Endurance Run 33:38:12 h8
23.08 100mi USA10th Cascade Crest Classic 100 Mile 25:52:45 h20
26.07 50mi USA16th White River 50 Mile Trail Run 11:29:04 h149
12.04 44.4mi USA8th Brew to Brew 44.4 mile 8:21:12 h27
2007
28.09 100mi USA9th The Bear 100 Mile Endurance Run 27:24:00 h15
15.06 100mi USA16th Bighorn Mountain Wild & Scenic 100mi Trail Run 28:24:50 h20
2006
09.09 100mi USA27th Wasatch Front 100 Mile 29:09:45 h47
19.08 100km USA5th Where's Waldo 100K Ultramarathon 16:11:13 h30
16.06 100mi USA15th Bighorn Mountain Wild & Scenic 100mi Trail Run 29:17:45 h33
20.05 12h USA2nd Watershed Preserve 12 Hr Trail Race 100.954 km5
2005
20.08 100km USA4th Where's Waldo 100K Ultramarathon 16:46:34 h23
17.06 100mi USA14th Bighorn Mountain Wild & Scenic 100mi Trail Run 30:24:51 h21
2004
28.08 100mi USA6th Cascade Crest Classic 100 Mile 30:23:00 h33
1984
14.04 100mi USA3rd The New Astley Belt Six Day Race - 100mi Split 21:58:18 h5
1981
12.04 50mi USA2nd American River 50 Mile Endurance Run 9:21:17 h163
28.02 100mi USAFlatlander Ultramarathon - 100 Mile Run 17:51:10 h1 🏆
1980
13.04 50mi USA1st American River 50 Mile Endurance Run 7:24:19 h10
Unknown date
— 48h USA13th Jackpot Ultra Running Festival 48 Hour Race 282.462 km3 🥉