Mark Nelson
ID 397863
Born : 1968 Cat. M55 Ultrarunner since 2013 USA
25
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
26
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
44,7%
Rank quotient ?This runner's calculation uses 25 eligible race(s): Σ(rank − 1) = 1 538; Σ finishers = 3 440. 1 538 / 3 440 × 100 = 44.71%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed25
Km — ultra races1 280 km
Longest race80,5 km
38th Ice Age Trail 50 Mile Run — 11/5/2019

Km per year (ultra races)

50
1 race
2022
50
1 race
2023
50
1 race
2024
100
2 races
2025
50
1 race
2026

Race types (share of distance)

Road46,9%
Trail53,1%

Records

50 km4h38'0650 mi11h12'48

HISTORY

25 race(s)
DateRacePerf.Rk
2026
13.06 50km USA31st Kettle Moraine 50 km Endurance Run 7:58:53 h51
2025
01.11 50km USA26th Chicago Lakefront Fall 50km Race 6:23:29 h58
14.06 50km USA30th Kettle Moraine 50 km Endurance Run 7:44:11 h51
2024
02.11 50km USA25th Chicago Lakefront Fall 50km Race 6:28:28 h71
2023
25.03 50km USA24th Chicago Lakefront Spring 50km Race 6:09:33 h32
2022
26.03 50km USA23th Chicago Lakefront Spring 50km Race 6:09:34 h32
2021
31.10 50km USA22th Chicago Lakefront Fall 50km Race 6:19:23 h61
11.09 50km USA40th Ice Age Trail 50 km Run 7:10:02 h56
27.03 50km USA22nd Chicago Lakefront Spring 50km Race 5:56:28 h43
2019
02.11 50km USA20th Chicago Lakefront Fall 50km Race 6:10:05 h53
11.05 50mi USA38th Ice Age Trail 50 Mile Run 11:12:48 h269
2018
02.06 50km USA23rd Kettle Moraine 50 km Endurance Run 6:46:33 h34
2017
28.10 50km USA18th Chicago Lakefront Fall 50km Race 6:42:56 h108
13.05 50km USA36th Ice Age Trail 50 km Run 6:13:38 h62
08.04 50km USA7th Hawkeye 50K Trail Run 5:38:32 h25
2016
29.10 50km USA17th Chicago Lakefront Fall 50km Race 5:34:34 h41
17.09 50km USA9th Endurance Challenge - Wisconsin Trail 50 km 5:56:24 h84
14.05 50km USA35th Ice Age Trail 50 km Run 6:33:23 h122
09.04 50km USA6th Hawkeye 50K Trail Run 5:11:10 h20
2015
09.05 50km USA34th Ice Age Trail 50 km Run 5:35:30 h56
11.04 50km USA5th Hawkeye 50K Trail Run 4:42:34 h13
21.03 50km USA16th Chicago Lakefront Spring 50km Race 5:07:19 h52
2014
14.09 50km USA7th Endurance Challenge - Wisconsin Trail 50 km 5:43:00 h95
05.04 50km USA15th Chicago Lakefront Spring 50km Race 4:38:06 h24
2013
23.03 50km USA14th Chicago Lakefront Spring 50km Race 4:53:03 h50