Anstr Davidson

Born : 1945 Cat. M80 Ultrarunner since 1982

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

61,0%

Rank quotient ?This runner's calculation uses 116 eligible race(s): Σ(rank − 1) = 17 497; Σ finishers = 28 666. 17 497 / 28 666 × 100 = 61.04%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed119

Km — ultra races9 395 km

> 100 km17

> 160 km13

> 200 km1

> 24h2

> 48h2

Longest race254,3 km

Trail Run Across the Commonwealth (TRAC) — 1/9/1991

Km per year (ultra races)

2022

2023

2024

2025

2026

Race types (share of distance)

Road4,4%

Trail92,9%

Stage2,7%

Wins & podiums (ultra)

🏆 Win0

🏆 Win M0

🏅 Top 31

🏅 Top 3 M1

Longest winning streak0

Current streak0

Records

50 km4h39'11 100 km10h30'56 50 mi8h30'48 100 mi22h33'46

HISTORY

116 race(s)

Date		Race	Perf.	Rk
2016
01.09	85h	2nd A Race for the Ages	168.981 km	74
2015
04.09	84h	1st A Race for the Ages	144.840 km	116
2012
17.11	50mi	50th JFK 50 Mile	13:28:26 h	927
25.02	50km	4th Hashawha Hills 50 km Trail Run	8:11:08 h	90
2011
19.11	50mi	49th JFK 50 Mile	12:51:55 h	819
19.03	50km	23rd The HAT Run 50K	7:47:39 h	337
26.02	50km	3rd Hashawha Hills 50 km Trail Run	8:11:52 h	75
2010
20.11	50mi	48th JFK 50 Mile	13:06:49 h	947
07.11	50km	3rd Potomac Heritage Trail	8:27:00 h	52
20.03	50km	22nd The HAT Run 50K	8:15:41 h	321
2009
21.11	50mi	47th JFK 50 Mile	12:40:11 h	921
01.11	50km	2nd Potomac Heritage Trail	9:14:00 h	54
31.03	50km	21th The HAT Run 50K	7:39:30 h	354
2008
22.11	50mi	46th JFK 50 Mile	12:23:52 h	791
2007
17.11	50mi	45th JFK 50 Mile	12:23:07 h	942
24.03	50km	19th The HAT Run 50K	7:24:59 h	280
2006
16.12	50km	11th Magnus Gluteus Maximus 50 km	7:48:00 h	74
18.11	50mi	44th JFK 50 Mile	12:06:21 h	855
05.08	50km	11th Catoctin 50k Trail Run	8:48:26 h	102
16.06	50mi	15th Bighorn Mountain Wild & Scenic 50mi Trail Run	14:32:07 h	91
01.01	50km	10th Red Eye 50km	7:38:00 h	17
2005
10.12	50km	10th Magnus Gluteus Maximus - Potchari Hippu 50 km	7:40:00 h	47
19.11	50mi	43rd JFK 50 Mile	10:26:22 h	446
15.10	50mi	23th Mountain Masochist 50 Mile Trail Run	11:47:55 h	185
19.03	50km	17th The HAT Run 50K	6:38:55 h	275
01.01	50km	9th Red Eye 50km	8:05:00 h	13
2004
20.11	50mi	42nd JFK 50 Mile	10:36:04 h	432
24.04	50km	4th Promise Land 50K++	8:26:06 h	137
27.03	50km	16th The HAT Run 50K	6:37:50 h	242
2003
22.11	50mi	41st JFK 50 Mile	10:39:41 h	435
18.10	50mi	21th Mountain Masochist 50 Mile Trail Run	11:42:34 h	193
02.08	50km	8th Catoctin 50k Trail Run	8:24:47 h	69
26.04	50km	3rd Promise Land 50K++	7:47:08 h	117
29.03	50km	15th The HAT Run 50K	6:27:42 h	160
2002
14.12	50km	7th Magnus Gluteus Maximus - Fat Taffy Kiss 50 km	7:39:00 h	37
23.11	50mi	40th JFK 50 Mile	10:56:11 h	496
10.08	50km	7th Catoctin 50k Trail Run	9:04:43 h	83
23.03	50km	14th The HAT Run 50K	6:22:59 h	182
2001
17.11	50mi	39th JFK 50 Mile	10:27:56 h	391
11.08	50km	6th Catoctin 50k Trail Run	8:41:09 h	76
07.04	50mi	9th Bull Run Run 50 Miler	11:29:32 h	150
24.03	50km	13th The HAT Run 50K	6:11:39 h	169
2000
04.11	50mi	38th JFK 50 Mile	10:38:55 h	373
05.08	50km	5th Catoctin 50k Trail Run	8:39:37 h	79
24.03	50km	12th The HAT Run 50K	6:06:08 h	156
1999
18.12	50km	4th Magnus Gluteus Maximus - Patpela Ananit 50 km	7:03:00 h	28
20.11	50mi	37th JFK 50 Mile	9:41:13 h	296
17.04	50mi	7th Bull Run Run 50 Miler	10:53:43 h	129
20.03	50km	11th The HAT Run 50K	5:24:23 h	105
13.03	50km	3rd Catoctin 50k Trail Run	7:59:35 h	26
01.01	50km	4th Red Eye 50km	6:38:00 h	11
1998
12.12	50km	3rd Magnus Gluteus Maximus - Bufu-Bufu Baty 50 km	6:45:00 h	19
21.11	50mi	36th JFK 50 Mile	9:14:57 h	212
07.11	50mi	16th Mountain Masochist 50 Mile Trail Run	11:28:52 h	132
03.10	45mi	8th Andiamo 45 Mile Run	8:46:00 h	8
09.05	100mi	4th Massanutten Mountain Trails 100 Mile	33:40:58 h	42
28.03	50km	10th The HAT Run 50K	5:50:48 h	77
21.02	50mi	12th Wild Oak Trail 50 Mile Race	17:01:38 h	18
1997
13.12	50km	2nd Magnus Gluteus Maximus - Fet Bakdel 50 km	6:55:00 h	23
22.11	50mi	35th JFK 50 Mile	9:47:46 h	262
01.11	50mi	15th Mountain Masochist 50 Mile Trail Run	11:08:54 h	95
19.07	100mi	9th Vermont 100 Mile Endurance Race	23:13:14 h	88
1996
14.12	50km	1st Magnus Gluteus Maximus 50 km	7:24:00 h	17
23.11	50mi	34th JFK 50 Mile	9:22:27 h	187
28.09	100mi	11th Angeles Crest 100 Mile	32:24:03 h	95
1995
18.11	50mi	33rd JFK 50 Mile	9:27:54 h	132
05.08	50km	1st Catoctin 50k Trail Run	8:09:29 h	31
08.04	50mi	3rd Bull Run Run 50 Miler	11:13:22 h	59
25.03	50km	7th The HAT Run 50K	4:39:11 h	41
25.02	50mi	8th Wild Oak Trail 50 Mile Race	15:03:13 h	18
1994
19.11	50mi	32nd JFK 50 Mile	8:38:29 h	86
22.10	50mi	12th Mountain Masochist 50 Mile Trail Run	11:04:16 h	107
24.09	100mi	9th Angeles Crest 100 Mile	30:39:00 h	57
26.03	50km	6th The HAT Run 50K	4:43:44 h	51
1993
20.11	50mi	31st JFK 50 Mile	8:57:46 h	78
16.10	45mi	4th Andiamo 45 Mile Run	8:14:00 h	7
11.09	50mi	10th Groundhog Fall 50 Mile Endurance Run	9:33:46 h	82
12.06	70.5mi	14th Laurel Highlands 70 Mile Ultra	17:33:18 h	18
17.04	50mi	1st Bull Run Run 50 Miler	11:40:00 h	33
27.03	50km	5th The HAT Run 50K	5:28:03 h	38
1992
21.11	50mi	30th JFK 50 Mile	8:52:06 h	76
12.09	50mi	9th Groundhog Fall 50 Mile Endurance Run	9:16:20 h	48
27.06	100mi	19th Western States 100 Mile Endurance Run	29:06:16 h	184
28.03	50km	4th The HAT Run 50K	5:12:08 h	36
1991
23.11	50mi	29th JFK 50 Mile	8:52:40 h	92
26.10	50mi	9th Mountain Masochist 50 Mile Trail Run	10:49:41 h	106
07.09	50mi	8th Groundhog Fall 50 Mile Endurance Run	9:12:32 h	60
01.09	158mi/4stages	Trail Run Across the Commonwealth	42:08:02 h	4
08.06	70.5mi	12th Laurel Highlands 70 Mile Ultra	17:39:52 h	16
23.03	50km	3rd The HAT Run 50K	5:10:35 h	32
1990
17.11	50mi	28th JFK 50 Mile	8:44:13 h	74
27.10	50mi	8th Mountain Masochist 50 Mile Trail Run	10:47:22 h	84
21.07	100mi	2nd Vermont 100 Mile Endurance Race	22:33:46 h	61
09.06	70.5mi	11th Laurel Highlands 70 Mile Ultra	17:30:14 h	10
24.03	50km	2nd The HAT Run 50K	5:16:02 h	27
1989
18.11	50mi	27th JFK 50 Mile	8:30:48 h	63
09.09	50mi	6th Groundhog Fall 50 Mile Endurance Run	9:23:04 h	45
29.07	100mi	1st Vermont 100 Mile Endurance Race	22:51:41 h	51
1988
19.11	50mi	26th JFK 50 Mile	8:59:02 h	52
22.10	50mi	6th Mountain Masochist 50 Mile Trail Run	10:23:22 h	63
10.09	50mi	5th Groundhog Fall 50 Mile Endurance Run	8:39:10 h	31
11.06	100mi	10th Old Dominion 100 Mile Endurance Run	23:06:00 h	26
1987
21.11	50mi	25th JFK 50 Mile	8:44:02 h	45
24.10	50mi	5th Mountain Masochist 50 Mile Trail Run	10:35:32 h	34
13.06	100mi	9th Old Dominion 100 Mile Endurance Run	23:22:58 h	40
1986
22.11	50mi	24th JFK 50 Mile	8:45:31 h	48
14.09	100km	Del Passatore 100 km Run/Walk	10:30:56 h	4
14.06	100mi	8th Old Dominion 100 Mile Endurance Run	23:32:00 h	15
1985
23.11	50mi	23rd JFK 50 Mile	8:52:22 h	63
26.10	50mi	3rd Mountain Masochist 50 Mile Trail Run	9:48:32 h	22
08.06	100mi	7th Old Dominion 100 Mile Endurance Run	27:26:00 h	17
1984
17.11	50mi	22nd JFK 50 Mile	8:39:30 h	47
30.09	50mi	Rocky One 50 Miler	11:42:00 h	3 🥉
1983
19.11	50mi	21st JFK 50 Mile	8:37:07 h	68
08.10	48.6mi	Cow Mountain Planet Earth Run	8:58:14 h	37
1982
02.10	48.6mi	Cow Mountain Planet Earth Run	8:44:00 h	39

Filter

Runner	Races in common

DUV-index calculation details

#	Date	Race	Credited km	DUV-index+
✓ 1	1/9/1991	Trail Run Across the Commonwealth (TRAC)	254,28	×3
✓ 2	1/9/2016	2nd A Race for the Ages	168,98	×2
✓ 3	9/5/1998	4th Massanutten Mountain Trails 100 Mile	160,93	×2
✓ 4	19/7/1997	9th Vermont 100 Mile Endurance Race	160,93	×2
✓ 5	28/9/1996	11th Angeles Crest 100 Mile	160,93	×2
✓ 6	24/9/1994	9th Angeles Crest 100 Mile	160,93	×2
✓ 7	27/6/1992	19th Western States 100 Mile Endurance Run	160,93	×2
✓ 8	21/7/1990	2nd Vermont 100 Mile Endurance Race	160,93	×2
✓ 9	29/7/1989	1st Vermont 100 Mile Endurance Race	160,93	×2
✓ 10	11/6/1988	10th Old Dominion 100 Mile Endurance Run	160,93	×2
✓ 11	13/6/1987	9th Old Dominion 100 Mile Endurance Run	160,93	×2
✓ 12	14/6/1986	8th Old Dominion 100 Mile Endurance Run	160,93	×2
✓ 13	8/6/1985	7th Old Dominion 100 Mile Endurance Run	160,93	×2
✓ 14	4/9/2015	1st A Race for the Ages	144,84	×1
✓ 15	12/6/1993	14th Laurel Highlands 70 Mile Ultra	113,46	×1
✓ 16	8/6/1991	12th Laurel Highlands 70 Mile Ultra	113,46	×1
✓ 17	9/6/1990	11th Laurel Highlands 70 Mile Ultra	113,46	×1
✓ 18	14/9/1986	Del Passatore 100 km Run/Walk	100,00	×1
✓ 19	17/11/2012	50th JFK 50 Mile	80,47	×1
✓ 20	19/11/2011	49th JFK 50 Mile	80,47	×1
✓ 21	20/11/2010	48th JFK 50 Mile	80,47	×1
✓ 22	21/11/2009	47th JFK 50 Mile	80,47	×1
✓ 23	22/11/2008	46th JFK 50 Mile	80,47	×1
✓ 24	17/11/2007	45th JFK 50 Mile	80,47	×1
✓ 25	18/11/2006	44th JFK 50 Mile	80,47	×1
✓ 26	16/6/2006	15th Bighorn Mountain Wild & Scenic 50mi Trail Run	80,47	×1
✓ 27	19/11/2005	43rd JFK 50 Mile	80,47	×1
✓ 28	15/10/2005	23th Mountain Masochist 50 Mile Trail Run	80,47	×1
✓ 29	20/11/2004	42nd JFK 50 Mile	80,47	×1
✓ 30	22/11/2003	41st JFK 50 Mile	80,47	×1
✓ 31	18/10/2003	21th Mountain Masochist 50 Mile Trail Run	80,47	×1
✓ 32	23/11/2002	40th JFK 50 Mile	80,47	×1
✓ 33	17/11/2001	39th JFK 50 Mile	80,47	×1
✓ 34	7/4/2001	9th Bull Run Run 50 Miler	80,47	×1
✓ 35	4/11/2000	38th JFK 50 Mile	80,47	×1
✓ 36	20/11/1999	37th JFK 50 Mile	80,47	×1
✓ 37	17/4/1999	7th Bull Run Run 50 Miler	80,47	×1
✓ 38	21/11/1998	36th JFK 50 Mile	80,47	×1
✓ 39	7/11/1998	16th Mountain Masochist 50 Mile Trail Run	80,47	×1
✓ 40	21/2/1998	12th Wild Oak Trail 50 Mile Race	80,47	×1
✓ 41	22/11/1997	35th JFK 50 Mile	80,47	×1
✓ 42	1/11/1997	15th Mountain Masochist 50 Mile Trail Run	80,47	×1
✓ 43	23/11/1996	34th JFK 50 Mile	80,47	×1
✓ 44	18/11/1995	33rd JFK 50 Mile	80,47	×1
✓ 45	8/4/1995	3rd Bull Run Run 50 Miler	80,47	×1
✓ 46	25/2/1995	8th Wild Oak Trail 50 Mile Race	80,47	×1
✓ 47	19/11/1994	32nd JFK 50 Mile	80,47	×1
✓ 48	22/10/1994	12th Mountain Masochist 50 Mile Trail Run	80,47	×1
✓ 49	20/11/1993	31st JFK 50 Mile	80,47	×1
✓ 50	11/9/1993	10th Groundhog Fall 50 Mile Endurance Run	80,47	×1
✓ 51	17/4/1993	1st Bull Run Run 50 Miler	80,47	×1
✓ 52	21/11/1992	30th JFK 50 Mile	80,47	×1
✓ 53	12/9/1992	9th Groundhog Fall 50 Mile Endurance Run	80,47	×1
✓ 54	23/11/1991	29th JFK 50 Mile	80,47	×1
✓ 55	26/10/1991	9th Mountain Masochist 50 Mile Trail Run	80,47	×1
✓ 56	7/9/1991	8th Groundhog Fall 50 Mile Endurance Run	80,47	×1
✓ 57	17/11/1990	28th JFK 50 Mile	80,47	×1
✓ 58	27/10/1990	8th Mountain Masochist 50 Mile Trail Run	80,47	×1
✓ 59	18/11/1989	27th JFK 50 Mile	80,47	×1
✓ 60	9/9/1989	6th Groundhog Fall 50 Mile Endurance Run	80,47	×1
✓ 61	19/11/1988	26th JFK 50 Mile	80,47	×1
✓ 62	22/10/1988	6th Mountain Masochist 50 Mile Trail Run	80,47	×1
✓ 63	10/9/1988	5th Groundhog Fall 50 Mile Endurance Run	80,47	×1
✓ 64	21/11/1987	25th JFK 50 Mile	80,47	×1
✓ 65	24/10/1987	5th Mountain Masochist 50 Mile Trail Run	80,47	×1
✓ 66	22/11/1986	24th JFK 50 Mile	80,47	×1
✓ 67	23/11/1985	23rd JFK 50 Mile	80,47	×1
✓ 68	26/10/1985	3rd Mountain Masochist 50 Mile Trail Run	80,47	×1
✓ 69	17/11/1984	22nd JFK 50 Mile	80,47	×1
✓ 70	30/9/1984	Rocky One 50 Miler	80,47	×1
✓ 71	19/11/1983	21st JFK 50 Mile	80,47	×1
✓ 72	8/10/1983	Cow Mountain Planet Earth Run	78,21	—
✓ 73	2/10/1982	Cow Mountain Planet Earth Run	78,21	—
74	3/10/1998	8th Andiamo 45 Mile Run	72,42	—
75	16/10/1993	4th Andiamo 45 Mile Run	72,42	—
76	25/2/2012	4th Hashawha Hills 50 km Trail Run	50,00	—
77	19/3/2011	23rd The HAT Run 50K	50,00	—
78	26/2/2011	3rd Hashawha Hills 50 km Trail Run	50,00	—
79	7/11/2010	3rd Potomac Heritage Trail	50,00	—
80	20/3/2010	22nd The HAT Run 50K	50,00	—
81	1/11/2009	2nd Potomac Heritage Trail	50,00	—
82	31/3/2009	21th The HAT Run 50K	50,00	—
83	24/3/2007	19th The HAT Run 50K	50,00	—
84	16/12/2006	11th Magnus Gluteus Maximus 50 km	50,00	—
85	5/8/2006	11th Catoctin 50k Trail Run	50,00	—
86	1/1/2006	10th Red Eye 50km	50,00	—
87	10/12/2005	10th Magnus Gluteus Maximus - Potchari Hippu 50 km	50,00	—
88	19/3/2005	17th The HAT Run 50K	50,00	—
89	1/1/2005	9th Red Eye 50km	50,00	—
90	24/4/2004	4th Promise Land 50K++	50,00	—
91	27/3/2004	16th The HAT Run 50K	50,00	—
92	2/8/2003	8th Catoctin 50k Trail Run	50,00	—
93	26/4/2003	3rd Promise Land 50K++	50,00	—
94	29/3/2003	15th The HAT Run 50K	50,00	—
95	14/12/2002	7th Magnus Gluteus Maximus - Fat Taffy Kiss 50 km	50,00	—
96	10/8/2002	7th Catoctin 50k Trail Run	50,00	—
97	23/3/2002	14th The HAT Run 50K	50,00	—
98	11/8/2001	6th Catoctin 50k Trail Run	50,00	—
99	24/3/2001	13th The HAT Run 50K	50,00	—
100	5/8/2000	5th Catoctin 50k Trail Run	50,00	—
101	24/3/2000	12th The HAT Run 50K	50,00	—
102	18/12/1999	4th Magnus Gluteus Maximus - Patpela Ananit 50 km	50,00	—
103	20/3/1999	11th The HAT Run 50K	50,00	—
104	13/3/1999	3rd Catoctin 50k Trail Run	50,00	—
105	1/1/1999	4th Red Eye 50km	50,00	—
106	12/12/1998	3rd Magnus Gluteus Maximus - Bufu-Bufu Baty 50 km	50,00	—
107	28/3/1998	10th The HAT Run 50K	50,00	—
108	13/12/1997	2nd Magnus Gluteus Maximus - Fet Bakdel 50 km	50,00	—
109	14/12/1996	1st Magnus Gluteus Maximus 50 km	50,00	—
110	5/8/1995	1st Catoctin 50k Trail Run	50,00	—
111	25/3/1995	7th The HAT Run 50K	50,00	—
112	26/3/1994	6th The HAT Run 50K	50,00	—
113	27/3/1993	5th The HAT Run 50K	50,00	—
114	28/3/1992	4th The HAT Run 50K	50,00	—
115	23/3/1991	3rd The HAT Run 50K	50,00	—
116	24/3/1990	2nd The HAT Run 50K	50,00	—