Kenneth Posner
ID 37785
Born : 1963 Cat. M60 Ultrarunner since 2006 USA
50
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
62
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 ?BRABrazilUSAUnited States
40,7%
Rank quotient ?This runner's calculation uses 63 eligible race(s): Σ(rank − 1) = 2 223; Σ finishers = 5 462. 2 223 / 5 462 × 100 = 40.70%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed63
Km — ultra races6 263 km
> 100 km20
> 160 km17
> 200 km3
> 24h7
> 48h1
Longest race217,3 km
26th Badwater Ultramarathon — 16/7/2012

Km per year (ultra races)

2022
210
3 races
2023
2024
231
2 races
2025
50
1 race
2026

Race types (share of distance)

Road34,9%
Trail65,1%

Wins & podiums (ultra)

🏆 Win2
🏆 Win M3
🏅 Top 37
🏅 Top 3 M7
Longest winning streak1
Current streak0

Records

50 km3h50'40100 km11h15'5750 mi7h17'51100 mi19h23'4112 h81,36 km24 h166,76 km48 h177,03 km

HISTORY

63 race(s) · 1 split(s) nested
DateRacePerf.Rk
2026
28.02 50km USA8th Grandmaster Ultras 50 km Run 13:26:00 h32
2025
22.11 24h USA7th Fat Ox 24 Hour Run 117.683 km3 🥉
11.10 24h USA6th Hainesport Hundred 24 Hour Endurance Run Summer 113.265 km7
2023
28.12 24h USA39th Across the Years, 24h 99.748 km38
07.10 50km USA11th Tesla Hertz Run 50 km 6:39:09 h19
05.08 12h USA5th Loopy Looper 12-Hour Run 60.363 km48
2021
31.12 24h USA2nd Hainesport Hundred 24 Hour Endurance Run 52.646 km33
03.07 12h USA2nd Hainesport Hundred 12 Hour Endurance Run Summer 81.362 km3 🥉
27.03 50km USA22nd Chicago Lakefront Spring 50km Race 7:07:20 h62
2020
31.12 24h USA1st Hainesport Hundred 24 Hour Endurance Run 81.336 km20
18.01 50km USA3th Knob Hills Trail Run 50km 6:56:37 h13
2019
09.11 50km USA23rd Rockledge Rumble Trail Run 8:20:14 h70
12.10 50km USA6th The Batona 50 km 7:36:33 h25
2017
06.05 50mi USA5th Rock The Ridge 50-Mile Endurance Challenge 11:22:17 h58
2016
30.04 50mi USA4th Rock The Ridge 50-Mile Endurance Challenge 9:48:00 h29
06.03 50km USA14th Caumsett Park 50K Lloyd Neck - Championships 3:57:34 h24
06.02 100km USA3rd Ordnance 100K 11:47:33 h15
2015
19.12 50mi USA8th Lookout Mountain 50 Mile Race 9:24:45 h40
08.08 100mi USA6th Beast of Burden Summer 100 Miler 21:31:47 h7
18.07 12h USA9th 12 hour Running with the Devil 62.764 km2 🥈
20.06 54mi USA3rd Manitou's Revenge Ultramarathon 18:21:20 h47
02.05 50mi USA3rd Rock The Ridge 50-Mile Endurance Challenge 7:17:51 h8
01.03 50km USA13th Caumsett Park 50K Lloyd Neck - Open Race 3:50:40 h1 🏆
24.01 100mi USA6th Beast of Burden Winter 100 Miler 19:23:41 h3 🥉
2014
15.11 60km USA34th NYRR Knickerbocker 60K 5:00:18 h17
10.08 100km USA1st Catskill Mountain Road Race 11:15:57 h1 🏆
16.05 48h USA6th 3 Days at the Fair 48 Hour Race 177.027 km18
03.05 50mi USA2nd Rock The Ridge 50-Mile Endurance Challenge 8:13:04 h5
22.02 50mi USA3rd Everglades 50 Mile Ultra Run 8:30:14 h3 🥉
2013
16.11 60km USA33rd NYRR Knickerbocker 60K 5:17:33 h28
05.10 24h USA4th Ted Corbitt 24-Hour Run 166.764 km8
20.07 100mi USA25th Vermont 100 Mile Endurance Race 26:02:08 h128
04.05 50mi USA1st Rock The Ridge 50-Mile Endurance Challenge 8:52:40 h17
23.03 50mi USA4th New Jersey Ultra Festival 50 Mile Race 8:35:36 h8
23.02 50km USA3rd Febapple Frozen 50 km 5:30:35 h15
2012
06.10 100mi USA2nd Yellowstone-Teton 100 Mile Endurance Run 21:26:27 h6
28.09 50km USA4th Mountain Madness 50K 5:59:59 h17
11.08 50km USA1st Wildcat Ridge Romp 50 km 6:11:13 h6
16.07 135mi USA26th Badwater Ultramarathon 36:51:20 h42
2011
19.11 100mi USA3rd The Chimera 100 Mile Mountain Race 27:58:17 h15
20.08 100mi USA29th Leadville Trail 100 Mile 28:49:49 h241
23.07 12h USA5th 12 hour Running with the Devil 59.867 km8
04.06 50km USA3rd Peak Ultra 50 km Endurance Run 5:51:46 h9
2010
20.11 60km USA30th NYRR Knickerbocker 60K 5:58:35 h70
25.09 100mi USA3rd Virgil Crest 100 Mile Ultra 33:32:00 h15
12.07 135mi USA24th Badwater Ultramarathon 38:07:02 h35
15.05 100mi USA3rd Keys100 Ultra-Marathons 100mi 23:44:18 h11
08.05 50mi USA3rd Endurance Challenge - New York Trail 50 Miles 13:16:15 h106
23.01 135mi BRA4ª Brazil 135mi Ultramaratona 2d 05:10:00 h32
2009
05.09 100mi USA5th Grand Teton Races 100 Miles 30:22:59 h9
19.06 100mi USA18th Bighorn Mountain Wild & Scenic 100mi Trail Run 32:12:32 h47
07.02 100mi USA17th Rocky Raccoon 100 Mile Trail Run 25:08:45 h83
2008
19.07 100mi USA20th Vermont 100 Mile Endurance Race 25:29:31 h81
14.06 70.5mi USA29th Laurel Highlands 70 Mile Ultra 20:28:52 h36
02.02 50mi USA16th Rocky Raccoon 50 Mile Trail Run 10:04:02 h43
05.01 100km USA8th Bandera 100 km Ultratrail 16:57:04 h54
2007
05.08 100km USA6th Katcina Mosa 100K Mountain Run 18:21:23 h25
30.06 50mi USA19th Finger Lakes Fifties 50 Mile Run 11:26:26 h29
21.04 50mi USA15th Leona Divide 50 Mile Run 10:48:42 h84
2006
04.11 50mi USA24th Mountain Masochist 50 Mile Trail Run 11:38:43 h185
01.07 50mi USA18th Finger Lakes Fifties 50 Mile Run 12:40:29 h14
29.04 50km USA6th Promise Land 50K++ 7:46:46 h112
14.01 50km USA4th Angel Island 50k 6:03:30 h16