Douglas Blackford

Born : 1947 Cat. M75 Ultrarunner since 2003

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 ?

France

United States

44,8%

Rank quotient ?This runner's calculation uses 76 eligible race(s): Σ(rank − 1) = 5 614; Σ finishers = 12 520. 5 614 / 12 520 × 100 = 44.84%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed76

Km — ultra races5 338 km

> 100 km6

> 160 km4

Longest race160,9 km

8th Pinhoti 100 Mile — 7/11/2015

Km per year (ultra races)

2022

2023

2024

2025

2026

Race types (share of distance)

Road1,9%

Trail98,1%

Records

50 km4h21'38 100 km14h12'03 50 mi9h43'06 100 mi26h36'07

HISTORY

76 race(s)

Date		Race	Perf.	Rk
2019
19.01	50km	9th Tsali Frosty Foot 50k	7:21:30 h	81
2017
23.09	50km	7th Table Rock 50 km Ultra	7:17:56 h	86
18.03	50km	10th Terrapin Mountain 50 km Race	7:26:31 h	138
25.02	40mi	19th Mount Mitchell Challenge	7:59:12 h	103
2016
03.09	50mi	11th Iron Mountain 50 Mile Trail Run	11:24:11 h	59
30.04	50km	16th Promise Land 50K++	7:20:32 h	138
23.04	50km	1st Grayson Highlands 50km Race	5:44:40 h	40
19.03	50km	9th Terrapin Mountain 50 km Race	6:21:37 h	66
2015
07.11	100mi	8th Pinhoti 100 Mile	26:36:07 h	57
17.10	54mi	5th Table Rock 50 Mile	13:53:04 h	21
30.05	50km	1st Quest for the Crest 50k	10:40:43 h	74
21.03	50km	8th Terrapin Mountain 50 km Race	6:09:14 h	80
28.02	40mi	17th Mount Mitchell Challenge	7:05:22 h	63
07.02	50km	3rd Mill Stone 50K	5:44:46 h	19
03.01	50km	6th Frozen Sasquatch 50 km Trail Race	6:40:13 h	28
2014
20.09	50km	1st The Barkley Fall Classic	12:47:31 h	143
30.08	50mi	9th Iron Mountain 50 Mile Trail Run	11:28:02 h	45
14.06	100mi	2nd Bryce 100 Mile Trail Run	31:25:10 h	52
26.04	50km	14th Promise Land 50K++	6:43:05 h	115
22.03	50km	7th Terrapin Mountain 50 km Race	6:00:50 h	71
22.02	40mi	16th Mount Mitchell Challenge	7:45:03 h	78
2013
12.10	50km	6th New River Trail 50 km	4:35:48 h	25
31.08	50mi	8th Iron Mountain 50 Mile Trail Run	10:58:36 h	39
20.04	50mi	1st Leatherwood Ultras 50 Mile	12:12:52 h	33
23.03	50km	6th Terrapin Mountain 50 km Race	6:10:22 h	98
23.02	40mi	15th Mount Mitchell Challenge	7:18:39 h	75
09.02	50km	1st Mill Stone 50K	5:46:15 h	20
2012
31.08	103.4km trail race	10ème Ultra Trail Tour du Mont Blanc (UTMB)	21:00:15 h	1166
24.03	50km	5th Terrapin Mountain 50 km Race	6:16:50 h	89
25.02	40mi	14th Mount Mitchell Challenge	8:15:25 h	103
04.02	40mi	20th Uwharrie Mountain Run	9:14:59 h	83
2011
25.08	110km	2ème Sur les Traces des Ducs de Savoie	25:59:12 h	317
18.06	40mi	9th Highlands Sky 40M Trail Run	9:24:53 h	68
23.04	50km	11th Promise Land 50K++	6:57:56 h	98
26.02	40mi	13th Mount Mitchell Challenge	7:22:34 h	55
29.01	50km	3rd The Sultan 50k	6:17:00 h	12
2010
11.12	100km	8th Hellgate 100 km	15:39:22 h	51
09.10	50km	3rd New River Trail 50 km	4:21:38 h	26
24.04	50km	10th Promise Land 50K++	6:52:30 h	90
27.03	50km	3rd Terrapin Mountain 50 km Race	6:15:36 h	59
20.03	33mi	11th Oak Mountain 50km Race	6:41:55 h	37
27.02	40mi	12th Mount Mitchell Challenge	6:37:55 h	50
13.02	50km	15th Holiday Lake 50K++	6:26:07 h	77
2009
12.12	100km	7th Hellgate 100 km	17:04:37 h	68
07.11	50mi	27th Mountain Masochist 50 Mile Trail Run	10:17:25 h	81
28.08	50mi	2nd Cheat Mountain Moonshine Madness 50 Mile Trail Run	11:15:49 h	32
19.06	100mi	18th Bighorn Mountain Wild & Scenic 100mi Trail Run	31:52:30 h	40
28.03	50mi	5th Bel Monte 50 Mile Endurance Run	10:43:44 h	12
28.02	40mi	11th Mount Mitchell Challenge	8:00:14 h	51
07.02	40mi	17th Uwharrie Mountain Run	8:40:50 h	27
2008
11.10	50km	1st New River Trail 50 km	4:23:33 h	14
04.10	50mi	3rd Iron Mountain 50 Mile Trail Run	9:43:06 h	10
17.05	100mi	14th Massanutten Mountain Trails 100 Mile	32:26:21 h	61
26.04	50km	8th Promise Land 50K++	6:55:41 h	70
22.03	50mi	4th Bel Monte 50 Mile Endurance Run	11:32:03 h	27
23.02	40mi	10th Mount Mitchell Challenge	6:59:19 h	39
2007
08.12	100km	5th Hellgate 100 km	15:50:53 h	42
29.09	50mi	2nd Iron Mountain 50 Mile Trail Run	10:08:45 h	21
24.02	40mi	9th Mount Mitchell Challenge	7:06:38 h	38
10.02	50km	12th Holiday Lake 50K++	5:29:55 h	64
2006
09.12	100km	4th Hellgate 100 km	15:42:01 h	23
07.10	50mi	1st Iron Mountain 50 Mile Trail Run	9:50:00 h	10
26.08	31.5mi	9th Tamalpa Headlands 50K	5:53:29 h	83
29.04	50km	6th Promise Land 50K++	7:44:50 h	111
25.02	40mi	8th Mount Mitchell Challenge	6:51:30 h	26
11.02	50km	11th Holiday Lake 50K++	6:05:34 h	74
2005
10.12	100km	3rd Hellgate 100 km	17:16:49 h	37
15.10	50mi	23th Mountain Masochist 50 Mile Trail Run	10:52:29 h	122
17.09	50km	3rd Great Eastern Endurance Run 50 km	6:42:39 h	19
04.06	100km	10th Kettle Moraine 100 km Endurance Run	14:12:03 h	14
26.02	40mi	7th Mount Mitchell Challenge	7:33:02 h	34
08.01	50km	6th Salem Lakeshore Frosty Fifty	4:30:23 h	21
2004
16.10	50mi	22th Mountain Masochist 50 Mile Trail Run	10:32:03 h	111
28.02	40mi	6th Mount Mitchell Challenge	7:08:05 h	31
10.01	50km	5th Salem Lakeshore Frosty Fifty	5:15:21 h	29
2003
22.02	40mi	5th Mount Mitchell Challenge	6:59:05 h	20

Filter

Runner	Races in common

DUV-index calculation details

#	Date	Race	Credited km	DUV-index+
✓ 1	7/11/2015	8th Pinhoti 100 Mile	160,93	×3
✓ 2	14/6/2014	2nd Bryce 100 Mile Trail Run	160,93	×3
✓ 3	19/6/2009	18th Bighorn Mountain Wild & Scenic 100mi Trail Run	160,93	×3
✓ 4	17/5/2008	14th Massanutten Mountain Trails 100 Mile	160,93	×3
✓ 5	25/8/2011	2ème Sur les Traces des Ducs de Savoie (TDS)	110,00	×2
✓ 6	31/8/2012	10ème Ultra Trail Tour du Mont Blanc (UTMB) (FRA)	103,40	×1
✓ 7	11/12/2010	8th Hellgate 100 km	100,00	×1
✓ 8	12/12/2009	7th Hellgate 100 km	100,00	×1
✓ 9	8/12/2007	5th Hellgate 100 km	100,00	×1
✓ 10	9/12/2006	4th Hellgate 100 km	100,00	×1
✓ 11	10/12/2005	3rd Hellgate 100 km	100,00	×1
✓ 12	4/6/2005	10th Kettle Moraine 100 km Endurance Run	100,00	×1
✓ 13	17/10/2015	5th Table Rock 50 Mile	86,90	×1
✓ 14	3/9/2016	11th Iron Mountain 50 Mile Trail Run	80,47	×1
✓ 15	30/8/2014	9th Iron Mountain 50 Mile Trail Run	80,47	×1
✓ 16	31/8/2013	8th Iron Mountain 50 Mile Trail Run	80,47	×1
✓ 17	20/4/2013	1st Leatherwood Ultras 50 Mile	80,47	×1
✓ 18	7/11/2009	27th Mountain Masochist 50 Mile Trail Run	80,47	×1
✓ 19	28/8/2009	2nd Cheat Mountain Moonshine Madness 50 Mile Trail Run	80,47	×1
✓ 20	28/3/2009	5th Bel Monte 50 Mile Endurance Run	80,47	×1
✓ 21	4/10/2008	3rd Iron Mountain 50 Mile Trail Run	80,47	×1
✓ 22	22/3/2008	4th Bel Monte 50 Mile Endurance Run	80,47	×1
✓ 23	29/9/2007	2nd Iron Mountain 50 Mile Trail Run	80,47	×1
✓ 24	7/10/2006	1st Iron Mountain 50 Mile Trail Run	80,47	×1
✓ 25	15/10/2005	23th Mountain Masochist 50 Mile Trail Run	80,47	×1
✓ 26	16/10/2004	22th Mountain Masochist 50 Mile Trail Run	80,47	×1
✓ 27	25/2/2017	19th Mount Mitchell Challenge	64,37	×1
✓ 28	28/2/2015	17th Mount Mitchell Challenge	64,37	×1
✓ 29	22/2/2014	16th Mount Mitchell Challenge	64,37	×1
✓ 30	23/2/2013	15th Mount Mitchell Challenge	64,37	×1
✓ 31	25/2/2012	14th Mount Mitchell Challenge	64,37	×1
✓ 32	4/2/2012	20th Uwharrie Mountain Run	64,37	×1
✓ 33	18/6/2011	9th Highlands Sky 40M Trail Run	64,37	×1
✓ 34	26/2/2011	13th Mount Mitchell Challenge	64,37	×1
✓ 35	27/2/2010	12th Mount Mitchell Challenge	64,37	×1
✓ 36	28/2/2009	11th Mount Mitchell Challenge	64,37	×1
✓ 37	7/2/2009	17th Uwharrie Mountain Run	64,37	×1
✓ 38	23/2/2008	10th Mount Mitchell Challenge	64,37	×1
✓ 39	24/2/2007	9th Mount Mitchell Challenge	64,37	×1
✓ 40	25/2/2006	8th Mount Mitchell Challenge	64,37	×1
✓ 41	26/2/2005	7th Mount Mitchell Challenge	64,37	×1
✓ 42	28/2/2004	6th Mount Mitchell Challenge	64,37	×1
✓ 43	22/2/2003	5th Mount Mitchell Challenge	64,37	×1
✓ 44	20/3/2010	11th Oak Mountain 50km Race	53,11	×1
✓ 45	26/8/2006	9th Tamalpa Headlands 50K	50,69	—
✓ 46	19/1/2019	9th Tsali Frosty Foot 50k	50,00	—
✓ 47	23/9/2017	7th Table Rock 50 km Ultra	50,00	—
✓ 48	18/3/2017	10th Terrapin Mountain 50 km Race	50,00	—
✓ 49	30/4/2016	16th Promise Land 50K++	50,00	—
✓ 50	23/4/2016	1st Grayson Highlands 50km Race	50,00	—
51	19/3/2016	9th Terrapin Mountain 50 km Race	50,00	—
52	30/5/2015	1st Quest for the Crest 50k	50,00	—
53	21/3/2015	8th Terrapin Mountain 50 km Race	50,00	—
54	7/2/2015	3rd Mill Stone 50K	50,00	—
55	3/1/2015	6th Frozen Sasquatch 50 km Trail Race	50,00	—
56	20/9/2014	1st The Barkley Fall Classic	50,00	—
57	26/4/2014	14th Promise Land 50K++	50,00	—
58	22/3/2014	7th Terrapin Mountain 50 km Race	50,00	—
59	12/10/2013	6th New River Trail 50 km	50,00	—
60	23/3/2013	6th Terrapin Mountain 50 km Race	50,00	—
61	9/2/2013	1st Mill Stone 50K	50,00	—
62	24/3/2012	5th Terrapin Mountain 50 km Race	50,00	—
63	23/4/2011	11th Promise Land 50K++	50,00	—
64	29/1/2011	3rd The Sultan 50k	50,00	—
65	9/10/2010	3rd New River Trail 50 km	50,00	—
66	24/4/2010	10th Promise Land 50K++	50,00	—
67	27/3/2010	3rd Terrapin Mountain 50 km Race	50,00	—
68	13/2/2010	15th Holiday Lake 50K++	50,00	—
69	11/10/2008	1st New River Trail 50 km	50,00	—
70	26/4/2008	8th Promise Land 50K++	50,00	—
71	10/2/2007	12th Holiday Lake 50K++	50,00	—
72	29/4/2006	6th Promise Land 50K++	50,00	—
73	11/2/2006	11th Holiday Lake 50K++	50,00	—
74	17/9/2005	3rd Great Eastern Endurance Run 50 km	50,00	—
75	8/1/2005	6th Salem Lakeshore Frosty Fifty	50,00	—
76	10/1/2004	5th Salem Lakeshore Frosty Fifty	50,00	—