David Black

Born : 1951 Cat. M75 Ultrarunner since 1981

DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.

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

Countries visited ?

United States

83,6%

Rank quotient ?This runner's calculation uses 66 eligible race(s): Σ(rank − 1) = 6 409; Σ finishers = 7 662. 6 409 / 7 662 × 100 = 83.65%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed66

Km — ultra races4 141 km

> 100 km4

> 160 km4

> 24h1

Longest race160,9 km

3rd Vermont 100 Mile Endurance Race — 27/7/1991

Km per year (ultra races)

2022

2023

2024

2025

2026

Race types (share of distance)

Road5,6%

Trail94,4%

Records

50 km5h38'55 100 km21h12'30 50 mi7h43'43 100 mi21h49'00

HISTORY

66 race(s)

Date		Race	Perf.	Rk
2022
25.06	50km	6th Night Train 50k	8:15:25 h	106
2021
09.10	50km	6th High Bridge Ultra 50K	7:55:07 h	46
2020
06.03	35h	3rd Conquer the Wall 35 Hour Endurance Challenge	46.188 km	16
2019
14.12	50km	1st Freight Train 50km Trail Run	14:32:41 h	84
26.10	50km	7th Kansas Rails-to-Trails Fall Extravaganza 50 km	14:33:09 h	88
01.06	50km	2nd Chesterfield Gorge 50 km Ultra Race	13:17:39 h	32
2018
13.10	50km	3rd High Bridge Ultra 50K	7:48:04 h	70
28.04	50km	10th Frisco Railroad 50 km Run	12:28:21 h	75
2017
21.01	50km	6th Angela Ivory 50K Memorial Run	7:38:37 h	18
2016
26.11	50km	14th Derby 50k Ultra Run	11:50:00 h	59
2015
14.11	50mi	2nd Tunnel Hill 50 Mile Race	17:27:03 h	254
25.10	50km	3rd Mutual Mine 50K	11:41:22 h	35
23.05	50km	2nd Booneville Backroads Ultra 50 km	8:08:29 h	24
28.03	50km	3rd Extreme North Dakota Sandhills Ultra 50 km Run Experience (END-SURE)	12:29:00 h	45
2014
12.07	50km	11th Dances with Dirt - Devil's Lake 50K Ultra	14:08:51 h	213
03.05	40mi	36th Strolling Jim 40 Mile	13:40:08 h	106
2013
19.07	50km	6th Lunar Trek 50 km Night Run	9:51:00 h	17
2012
15.06	50km	21th Bighorn Mountain Wild & Scenic 50km Trail Run	11:14:52 h	162
10.03	60km	9th Land Between The Lakes 60 km Trail Run	10:35:41 h	111
2011
17.12	50km	3rd Mel Williams Memorial Seashore (Seashore Nature Trail)	7:53:21 h	250
08.10	50mi	12th Heartland 50 Mile Race	15:39:15 h	34
10.09	50km	24th McKenzie River 50 km Trail Run	8:21:27 h	148
06.08	50km	2nd Wild Idaho Fifty km Endurance Run	13:42:10 h	27
29.05	50km	6th Trail Festival at Pineland Farms	8:31:35 h	137
14.05	50km	8th Dances with Dirt - Gnaw Bone 50 km Ultra	9:50:39 h	98
19.02	50km	6th Black Warrior 50K	8:23:41 h	80
16.01	50km	7th Calico Trail Run 50 km	8:38:12 h	88
2010
19.09	50km	13th Pisgah Mountain Trail Race	9:21:42 h	86
17.07	100km	3rd Vermont 100 km Endurance Race	21:12:30 h	14
19.06	50mi	21th Mohican Trail 50 Mile	15:37:27 h	87
22.05	50km	5th Jemez Mountain 50km Trail Run	12:22:56 h	145
17.04	50km	20th Ouachita Trail 50 km	9:43:09 h	101
06.03	50km	29th Carl Touchstone Memorial Mississippi Trail 50 km	8:50:43 h	58
13.02	55km	4th Moab Red Hot 55k	9:55:44 h	190
09.01	50km	10th Bandera 50 km Ultratrail	10:01:04 h	168
2009
24.10	50km	2nd Dogwood Canyon Trail Run	9:36:05 h	34
22.08	50km	4th Lean Horse Ultra-Marathon 50 km	8:42:50 h	14
04.04	50km	11th Lake McMurtry 50 km Trail Race	8:39:20 h	27
28.03	50km	4th Antelope Island Buffalo Run 50 km	8:15:40 h	109
17.01	38.5mi	4th The Ghost Town 38.5	11:26:44 h	67
2008
12.10	50km	1st FATS 50K Trail Race	9:44:00 h	16
08.09	50km	24th Groundhog Fall 50K	8:35:00 h	104
02.08	50km	4th HURL Elkhorn 50 km Endurance Run	10:25:51 h	38
05.07	50km	20th Finger Lakes Fifties 50 km Run	11:36:10 h	69
07.06	50km	1st Sage Burner Trail Run	9:45:49 h	35
23.02	50km	3rd Mount Cheaha 50K UltraMarathon Race	9:05:40 h	109
2007
08.12	50km	18th Sunmart Texas Trails 50 km	8:21:08 h	430
14.10	50km	21st Glacial Trail 50 km Race	9:13:38 h	94
15.09	32mi	13th Bohemian Alps 50 km Ultramarathon	8:48:00 h	29
2006
18.11	50mi	44th JFK 50 Mile	13:48:02 h	1001
07.10	50km	3rd Telegraph Trail 50K	8:17:42 h	81
09.09	50km	2nd Uncle Joe 50 km Ultramarathon	8:08:21 h	27
2005
29.10	50km	1st Goblin Valley Ultra 50k	8:01:18 h	84
1991
27.07	100mi	3rd Vermont 100 Mile Endurance Race	21:49:00 h	52
08.06	50mi	1st Winterhawk 50 Mile Trail Run	8:57:00 h	29
1990
18.08	100mi	8th Leadville Trail 100 Mile	29:39:48 h	109
02.06	50km	1st Shadow of the Giants 50K	5:38:55 h	66
10.03	50km	1st Way Too Cool 50K Endurance Run	5:45:07 h	67
1989
12.11	50km	6th San Juan Trail 50 km	6:32:27 h	83
20.05	50mi	8th Ice Age Trail 50 Mile Run	9:27:58 h	115
1988
25.06	100mi	15th Western States 100 Mile Endurance Run	23:59:32 h	118
1987
28.03	52.4mi	The Forty-Niner Double Marathon Trail Run	9:12:16 h	54
1985
06.07	100mi	12th Western States 100 Mile Endurance Run	23:34:57 h	79
18.05	50mi	4th Ice Age Trail 50 Mile Run	8:16:57 h	29
1984
20.05	50mi	3rd Ice Age Trail 50 Mile Run	8:25:33 h	23
1981
03.10	50mi	Gunflint Trail 50 Mile	7:43:43 h	11

Filter

Runner	Races in common

DUV-index calculation details

#	Date	Race	Credited km	DUV-index+
✓ 1	27/7/1991	3rd Vermont 100 Mile Endurance Race	160,93	×3
✓ 2	18/8/1990	8th Leadville Trail 100 Mile	160,93	×3
✓ 3	25/6/1988	15th Western States 100 Mile Endurance Run	160,93	×3
✓ 4	6/7/1985	12th Western States 100 Mile Endurance Run	160,93	×3
✓ 5	17/7/2010	3rd Vermont 100 km Endurance Race	100,00	×2
✓ 6	28/3/1987	The Forty-Niner Double Marathon Trail Run	84,33	×1
✓ 7	14/11/2015	2nd Tunnel Hill 50 Mile Race	80,47	×1
✓ 8	8/10/2011	12th Heartland 50 Mile Race	80,47	×1
✓ 9	19/6/2010	21th Mohican Trail 50 Mile	80,47	×1
✓ 10	18/11/2006	44th JFK 50 Mile	80,47	×1
✓ 11	8/6/1991	1st Winterhawk 50 Mile Trail Run	80,47	×1
✓ 12	20/5/1989	8th Ice Age Trail 50 Mile Run	80,47	×1
✓ 13	18/5/1985	4th Ice Age Trail 50 Mile Run	80,47	×1
✓ 14	20/5/1984	3rd Ice Age Trail 50 Mile Run	80,47	×1
✓ 15	3/10/1981	Gunflint Trail 50 Mile	80,47	×1
✓ 16	3/5/2014	36th Strolling Jim 40 Mile	64,37	×1
✓ 17	17/1/2009	4th The Ghost Town 38.5	61,96	×1
✓ 18	10/3/2012	9th Land Between The Lakes 60 km Trail Run	60,00	×1
✓ 19	13/2/2010	4th Moab Red Hot 55k	55,00	×1
✓ 20	15/9/2007	13th Bohemian Alps 50 km Ultramarathon	51,50	×1
✓ 21	25/6/2022	6th Night Train 50k	50,00	×1
✓ 22	9/10/2021	6th High Bridge Ultra 50K	50,00	×1
✓ 23	14/12/2019	1st Freight Train 50km Trail Run	50,00	×1
✓ 24	26/10/2019	7th Kansas Rails-to-Trails Fall Extravaganza 50 km	50,00	×1
✓ 25	1/6/2019	2nd Chesterfield Gorge 50 km Ultra Race	50,00	×1
✓ 26	13/10/2018	3rd High Bridge Ultra 50K	50,00	×1
✓ 27	28/4/2018	10th Frisco Railroad 50 km Run	50,00	×1
✓ 28	21/1/2017	6th Angela Ivory 50K Memorial Run	50,00	×1
✓ 29	26/11/2016	14th Derby 50k Ultra Run	50,00	×1
✓ 30	25/10/2015	3rd Mutual Mine 50K	50,00	×1
✓ 31	23/5/2015	2nd Booneville Backroads Ultra 50 km	50,00	×1
✓ 32	28/3/2015	3rd Extreme North Dakota Sandhills Ultra 50 km Run Experience (END-SURE)	50,00	×1
✓ 33	12/7/2014	11th Dances with Dirt - Devil's Lake 50K Ultra	50,00	×1
✓ 34	19/7/2013	6th Lunar Trek 50 km Night Run	50,00	×1
✓ 35	15/6/2012	21th Bighorn Mountain Wild & Scenic 50km Trail Run	50,00	×1
✓ 36	17/12/2011	3rd Mel Williams Memorial Seashore (Seashore Nature Trail)	50,00	×1
✓ 37	10/9/2011	24th McKenzie River 50 km Trail Run	50,00	×1
✓ 38	6/8/2011	2nd Wild Idaho Fifty km Endurance Run	50,00	×1
✓ 39	29/5/2011	6th Trail Festival at Pineland Farms	50,00	×1
✓ 40	14/5/2011	8th Dances with Dirt - Gnaw Bone 50 km Ultra	50,00	×1
✓ 41	19/2/2011	6th Black Warrior 50K	50,00	×1
✓ 42	16/1/2011	7th Calico Trail Run 50 km	50,00	×1
✓ 43	19/9/2010	13th Pisgah Mountain Trail Race	50,00	×1
✓ 44	22/5/2010	5th Jemez Mountain 50km Trail Run	50,00	×1
✓ 45	17/4/2010	20th Ouachita Trail 50 km	50,00	×1
✓ 46	6/3/2010	29th Carl Touchstone Memorial Mississippi Trail 50 km	50,00	×1
✓ 47	9/1/2010	10th Bandera 50 km Ultratrail	50,00	×1
✓ 48	24/10/2009	2nd Dogwood Canyon Trail Run	50,00	×1
✓ 49	22/8/2009	4th Lean Horse Ultra-Marathon 50 km	50,00	×1
✓ 50	4/4/2009	11th Lake McMurtry 50 km Trail Race	50,00	×1
51	28/3/2009	4th Antelope Island Buffalo Run 50 km	50,00	×1
52	12/10/2008	1st FATS 50K Trail Race	50,00	×1
53	8/9/2008	24th Groundhog Fall 50K	50,00	×1
54	2/8/2008	4th HURL Elkhorn 50 km Endurance Run	50,00	×1
55	5/7/2008	20th Finger Lakes Fifties 50 km Run	50,00	×1
56	7/6/2008	1st Sage Burner Trail Run	50,00	×1
57	23/2/2008	3rd Mount Cheaha 50K UltraMarathon Race	50,00	×1
58	8/12/2007	18th Sunmart Texas Trails 50 km	50,00	×1
59	14/10/2007	21st Glacial Trail 50 km Race	50,00	×1
60	7/10/2006	3rd Telegraph Trail 50K	50,00	×1
61	9/9/2006	2nd Uncle Joe 50 km Ultramarathon	50,00	×1
62	29/10/2005	1st Goblin Valley Ultra 50k	50,00	×1
63	2/6/1990	1st Shadow of the Giants 50K	50,00	×1
64	10/3/1990	1st Way Too Cool 50K Endurance Run	50,00	×1
65	12/11/1989	6th San Juan Trail 50 km	50,00	×1
66	6/3/2020	3rd Conquer the Wall 35 Hour Endurance Challenge	46,19	—