Mark Elderbrock
ID 67807
Born : 1961 Cat. M65 Ultrarunner since 1983 USA
50
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
57
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
55,2%
Rank quotient ?This runner's calculation uses 55 eligible race(s): Σ(rank − 1) = 3 468; Σ finishers = 6 287. 3 468 / 6 287 × 100 = 55.16%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed55
Km — ultra races5 560 km
> 100 km25
> 160 km19
> 24h10
Longest race175,2 km
3rd Olander Park 24 Hour Run — 18/9/1993

Km per year (ultra races)

372
3 races
2022
230
4 races
2023
80
1 race
2024
53
1 race
2025
2026

Race types (share of distance)

Road28,6%
Trail71,4%

Wins & podiums (ultra)

🏆 Win1
🏆 Win M1
🏅 Top 32
🏅 Top 3 M2
Longest winning streak1
Current streak0

Records

50 km5h25'4350 mi6h36'00100 mi19h51'0012 h52,90 km24 h175,21 km

HISTORY

56 race(s) · 1 split(s) nested
DateRacePerf.Rk
2025
04.10 12h USA2nd NEO24 52.895 km16
2024
27.07 50mi USA18th Burning River 50 Mile Endurance Run 18:14:40 h255
2023
29.07 50mi USA17th Burning River 50 Mile Endurance Run 14:33:50 h204
08.07 50km USA29th Buckeye Trail 50k 8:40:01 h162
10.06 50km USA4th Summer Sasquatch 50K 8:25:02 h41
08.04 50km USA16th Fools 50K Trail Run 8:28:14 h39
2022
08.10 100mi USA6th Canal Corridor 100 Mile Endurance Run 29:28:58 h108
30.07 100mi USA16th Burning River 100 Mile Endurance Run 29:28:00 h128
09.07 50km USA28th Buckeye Trail 50k 8:09:28 h132
2021
09.10 100mi USA5th Canal Corridor 100 Mile Endurance Run 27:58:04 h89
24.07 100mi USA15th Burning River 100 Mile Endurance Run 29:23:55 h137
05.06 50km USA2nd Summer Sasquatch 50K 8:05:01 h39
03.04 50km USA14th Fools 50K Trail Run 8:13:14 h87
2020
11.07 100mi USA4th Canal Corridor 100 Mile Endurance Run 28:12:00 h75
2019
21.09 24h USA13th North Coast 24 Hour Endurance Run 116.902 km26
27.07 102mi USA13th Burning River 100 Mile Endurance Run 29:29:36 h151
2017
16.09 24h USA11th North Coast 24 Hour Endurance Run 118.806 km57
08.07 100mi USA1st Canal Corridor 100 Mile Endurance Run 26:11:13 h27
28.01 50km USA6th Run for Regis 50K 6:59:14 h27
2016
17.09 24h USA10th North Coast 24 Hour Endurance Run 155.108 km35
06.08 100mi USA10th Burning River 100 Mile Endurance Run 29:00:57 h107
18.06 100mi USA27th Mohican Trail 100 Mile 30:32:26 h86
07.05 50km USA2nd CLE Trail 50K 6:35:28 h27
02.04 50mi USA37th American River 50 Mile Endurance Run 10:24:32 h164
23.01 50km USA5th Run for Regis 50K 6:15:14 h17
2015
19.09 24h USA9th North Coast 24 Hour Endurance Run 166.785 km23
25.07 100mi USA9th Burning River 100 Mile Endurance Run 29:25:00 h110
16.05 50km USAPlayin’ Possum 50K Trail Run 5:58:03 h35
2014
20.09 24h USA8th North Coast 24 Hour Endurance Run 117.497 km58
02.08 100mi USA8th Burning River 100 Mile Endurance Run 28:38:58 h95
30.03 50km USA7th Fools 50K Trail Run 6:22:50 h25
2013
21.09 24h USA7th North Coast 24 Hour Endurance Run 146.319 km24
13.01 50km USA4th Run for Regis 50K 6:35:17 h27
2012
30.09 50km USA3rd The Bear Chase 50 km 5:25:43 h47
28.07 100mi USA6th Burning River 100 Mile Endurance Run 26:41:50 h113
06.05 24h USA4th North Coast 24 Hour Endurance Run Spring 165.842 km17
01.04 50km USA5th Fools 50K Trail Run 6:04:09 h56
15.01 50km USA3rd Run for Regis 50K 6:48:38 h24
2011
16.01 50km USA2nd Run for Regis 50K 7:15:35 h21
2010
18.09 24h USA2nd North Coast 24 Hour Endurance Run 92.775 km114
31.07 100mi USA4th Burning River 100 Mile Endurance Run 24:19:36 h67
06.06 50km USA6th Another Dam 50K Run 5:49:48 h38
17.01 50km USA1st Run for Regis 50K 6:44:33 h34
2009
03.10 24h USA1st North Coast 24 Hour Endurance Run 141.526 km51
01.08 100mi USA3rd Burning River 100 Mile Endurance Run 23:53:42 h31
2008
02.08 100mi USA2nd Burning River 100 Mile Endurance Run 23:47:00 h24
26.01 50km USAWinter Buckeye Trail 50k 5:37:57 h28
2007
14.07 50km USA13th Buckeye Trail 50k 6:42:55 h97
27.01 50km USAWinter Buckeye Trail 50k 7:20:00 h43
2003
26.07 50km USA10th Buckeye Trail 50k 7:12:00 h26
2001
28.07 50km USA8th Buckeye Trail 50k 6:53:09 h26
2000
25.03 50km USA7th GNC 100 km Run Challenge - 50km Split 5:38:50 h76
1995
17.06 100mi USA6th Mohican Trail 100 Mile 19:51:00 h3 🥉
1993
18.09 24h USA3rd Olander Park 24 Hour Run 175.213 km21
1984
24.11 50mi USASea Gate Ultras 50 Mile Run 6:36:00 h1 🏆
1983
26.11 60km USASea Gate Ultras 60 km Run 4:47:30 h8