Issy Nielson
ID 165874
Born : 1982 Cat. W40 Ultrarunner since 2010 USA
46
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
2
Countries visited ?CANCanadaUSAUnited States
33,3%
Rank quotient ?This runner's calculation uses 46 eligible race(s): Σ(rank − 1) = 1 186; Σ finishers = 3 561. 1 186 / 3 561 × 100 = 33.31%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed46
Km — ultra races3 734 km
> 100 km9
> 160 km7
> 200 km1
> 24h2
Longest race321,9 km
41st Across The Years, 200mi — 28/12/2025

Km per year (ultra races)

420
5 races
2022
261
3 races
2023
241
2 races
2024
426
3 races
2025
55
1 race
2026

Race types (share of distance)

Road45,6%
Trail54,4%

Wins & podiums (ultra)

🏆 Win1
🏆 Win F10
🏅 Top 36
🏅 Top 3 F21
Longest winning streak1
Current streak0

Records

50 km4h01'2250 mi7h48'29100 mi20h56'166 h60,86 km12 h81,00 km24 h161,00 km

HISTORY

46 race(s) · 2 split(s) nested
DateRacePerf.Rk
2026
22.08 12h USA10th Jackrabbit Jubilee 12 Hour Run 55.499 km33
2025
28.12 200mi USA41st Across The Years, 200mi 5d 07:43:23 h12
21.06 54km USA10th Flagstaff Extreme Big Pine 54K Trail Run 7:59:45 h89
31.05 6h USA9th Hotfoot Hamster 6 Hour Run 50.499 km9
2024
28.12 100mi USA41th Across The Years, 100mi 5d 01:47:02 h100
01.06 12h USA8th Hotfoot Hamster 12 Hour Run 80.499 km8
2023
31.12 100mi USA39th Across The Years, 100mi 2d 02:56:29 h67
12.03 50km USA20th Prickly Pear 50 km Trail Run 6:24:13 h40
28.01 50km USA5th The Dallas Urban Ultra 50km 5:04:34 h2 🥈
2022
03.12 24h USA5th Perpetual Motion 24 Hour Race 104.317 km6
08.10 50km USA2nd Dana Peak Trail Run 8:07:54 h44
25.09 6h USA2nd Hula Loop 6-Hour Sunday Series - Race 2 54.524 km2 🥈
30.07 100mi USA4th Badger Trail Races by Ten Junk Miles Racing 30:50:42 h57
12.02 50km USA30th Rocky 50 km Trail Run 6:09:09 h59
2021
28.08 6h USA5th Hotfoot Hamster 6 Hour Run 51.016 km9
06.02 50km USA9th Elephant Mountain 50 km 6:29:54 h21
2020
05.12 50km USA11th McDowell Mountain Frenzy 50 km 6:02:46 h41
2018
14.07 50km USA1st The Peak 50k Race 6:48:33 h10
23.03 50km USA1st Chili Peppers Series - Day 4 4:28:22 h1 🏆
2017
02.12 50mi USA8th McDowell Mountain Frenzy 50 Mile 9:50:31 h10
02.09 12h USA1st Jackrabbit Jubilee 12 Hour Run 81.000 km15
22.07 50km USA7th Harding Hustle 50K 5:31:51 h10
06.05 24h USA1st Hotfoot Hamster 24 Hour Run 161.000 km2 🥈
08.04 88km USA2nd Whiskey Basin 88 km Trail Run 10:31:55 h8
18.03 50km USA8th Mesquite Canyon 50 km 6:41:16 h11
07.01 50km USA7th San Tan Scramble 50K 5:53:48 h12
2016
12.11 50km USA3rd Colossal Vail 50 km 6:45:49 h33
26.03 6h USA1st TARC To Hale and Back 6 Hours 50.694 km14
2015
08.11 6h USA7th Rhode Island 6 Hour Ultra 60.855 km7
2014
22.03 100mi USA5th New Jersey Ultra Festival 100 Mile Race 28:35:12 h19
08.02 50km USA3rd Mid-Maryland Ultra 50k 4:45:56 h10
19.01 52.7mi USA1st The Batona 50 Mile 9:49:00 h2 🥈
2013
10.11 6h USA5th Rhode Island 6 Hour Ultra 56.508 km16
17.08 100mi USA4th Beast of Burden Summer 100 Miler 20:56:16 h7
21.07 12h USA1st Cacapon 12 Hour Challenge 64.373 km9
26.05 50mi USA8th Trail Festival at Pineland Farms 8:59:43 h26
03.03 50km USA11th Caumsett Park 50K Lloyd Neck - Championships 4:01:22 h17
2012
10.12 50km USA3rd Seth’s Fat Ass 50K 4:29:30 h10
04.08 125km CAN13th Canadian Death Race 23:17:17 h117
24.03 50mi USA3rd New Jersey Ultra Festival 50 Mile Race 7:48:29 h3 🥉
11.02 50km USA1st Mid-Maryland Ultra 50k 4:46:17 h10
07.01 50km USA14th Fat Ass Race - GAC FA50 4:31:50 h18
2011
19.11 50mi USA49th JFK 50 Mile 8:20:29 h124
29.05 50mi USA6th Trail Festival at Pineland Farms 9:42:02 h61
19.03 50mi USA2nd New Jersey Ultra Festival 50 Mile Race 8:18:20 h8
2010
14.11 6h USA2nd Rhode Island 6 Hour Ultra 52.165 km43