Dennis Crosby
ID 33992
Born : 1946 Cat. M80 Ultrarunner since 2005 USA
44
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
1
Countries visited ?USAUnited States
80,8%
Rank quotient ?This runner's calculation uses 45 eligible race(s): Σ(rank − 1) = 2 520; Σ finishers = 3 118. 2 520 / 3 118 × 100 = 80.82%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed45
Km — ultra races3 716 km
> 100 km10
> 160 km9
Longest race160,9 km
10th Prairie Spirit 100 Mile Trail Ultra Race — 26/3/2022

Km per year (ultra races)

161
1 race
2022
100
2 races
2023
50
1 race
2024
100
2 races
2025
2026

Race types (share of distance)

Road32,0%
Trail68,0%

Wins & podiums (ultra)

🏆 Win0
🏆 Win M0
🏅 Top 31
🏅 Top 3 M1
Longest winning streak0
Current streak0

Records

50 km7h08'32100 km19h51'4650 mi10h13'19100 mi27h04'33

HISTORY

45 race(s)
DateRacePerf.Rk
2025
18.10 50km USA15th Pumpkin Holler 50 km Race 8:57:19 h87
05.07 50km USA1st Midnight Madness 8:46:18 h27
2024
19.10 50km USA14th Pumpkin Holler 50 km Race 8:52:33 h103
2023
21.10 50km USA13th Pumpkin Holler 50 km Race 9:06:19 h65
08.04 50km USA25th Taturs Lake McMurtry 50 km Trail Race 10:01:00 h33
2022
26.03 100mi USA10th Prairie Spirit 100 Mile Trail Ultra Race 28:32:59 h49
2021
16.10 50km USA11th Pumpkin Holler 50 km Race 9:54:11 h95
2019
06.07 51.5mi USA8th Midnight Madness 50 Miler Road Race 13:11:51 h22
30.03 100km USA7th Prairie Spirit 100 km Trail Ultra Race 19:51:46 h20
2018
10.11 50mi USA5th Tunnel Hill 50 Mile Race 14:28:59 h366
27.07 50mi USAUrban ICT 50 Mile Race 12:34:39 h5
24.03 100mi USA6th Prairie Spirit 100 Mile Trail Ultra Race 28:32:59 h49
20.01 50km USA7th Go Short, Go Long, Go Very Long 50K 7:31:56 h35
2017
21.10 50km USA7th Taturs Pumpkin Holler 50 km Race 10:40:25 h66
30.09 100mi USA3rd Tulsa Urban 100 Mile Race 29:22:55 h8
03.07 51.5mi USA6th Midnight Madness 50 Miler Road Race 12:19:31 h44
18.06 50km USA1st Armadillo Ultra Race 8:26:23 h18
08.04 50km USA19th Taturs Lake McMurtry 50 km Trail Race 8:13:42 h19
25.03 100mi USA5th Prairie Spirit 100 Mile Trail Ultra Race 27:04:33 h9
11.03 50km USA2nd The Mid South (Land Run) 51K Ultra Marathon 7:08:32 h41
25.02 50km USA8th Post Oak Lodge 50K Trail Challenge 8:13:45 h45
2016
15.10 100km USA6th Taturs Pumpkin Holler 100 km Race 21:40:49 h31
2015
06.06 100mi USA1st Tulsa Urban 100 Mile Race 30:52:30 h3 🥉
28.03 100mi USA3rd Prairie Spirit 100 Mile Trail Ultra Race 29:08:06 h48
07.03 50km USA6th Post Oak Lodge 50K Trail Challenge 8:05:23 h79
2014
29.03 100mi USA2nd Prairie Spirit 100 Mile Trail Ultra Race 28:38:52 h62
22.02 50km USA5th Post Oak Lodge 50K Trail Challenge 7:43:10 h61
2013
05.07 51.5mi USA4th Midnight Madness 50 Miler Road Race 12:28:38 h75
27.04 101km USA1st FlatRock 101K Ultra Trail Race 23:04:10 h33
02.03 50km USA4th Post Oak Lodge 50K Trail Challenge 7:58:01 h75
2012
06.07 51.5mi USA3rd Midnight Madness 50 Miler Road Race 12:53:35 h75
28.04 50mi USA4th Frisco Railroad 50 Mile Run 11:46:31 h33
07.04 50km USA14th Taturs Lake McMurtry 50 km Trail Race 7:32:30 h50
25.02 50km USA3rd Post Oak Lodge 50K Trail Challenge 8:06:24 h67
2011
15.10 100mi USA1st Taturs Pumpkin Holler 100 Mile Race 29:40:30 h31
24.09 50km USA2nd Do-Wacka-Do 50 km Trail Run 8:11:17 h10
24.09 50km USA17th Flatrock 50K 8:54:58 h52
01.07 51.5mi USA2nd Midnight Madness 50 Miler Road Race 13:31:17 h83
2008
12.04 50km USA10th Lake McMurtry 50 km Trail Race 8:12:36 h26
2007
08.12 50mi USA1st IAU Trail WC Huntsville (18th Sunmart Texas Trail) 10:13:19 h83
16.09 50km USA2nd Turkey & Taturs 50 km Trail Race 8:47:45 h45
04.03 50km USAA-OK Trail Run 7:14:37 h18
2006
10.11 100mi USA1st Mother Road 100 Mile 28:42:06 h105
30.09 50km USA12th Flatrock 50K 8:30:40 h24
2005
03.12 50mi USA16th Sunmart Texas Trails 50 Mile 12:05:54 h190