Jeffrey Mallach

Born : 1960 Cat. M65 Ultrarunner since 1999

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

53,0%

Rank quotient ?This runner's calculation uses 55 eligible race(s): Σ(rank − 1) = 3 245; Σ finishers = 6 118. 3 245 / 6 118 × 100 = 53.04%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed55

Km — ultra races3 935 km

> 100 km3

> 160 km3

Longest race160,9 km

10th Cascade Crest Classic 100 Mile — 23/8/2008

Km per year (ultra races)

2022

2023

2024

2025

2026

Race types (share of distance)

Trail100,0%

Records

50 km5h13'56 50 mi9h11'22 100 mi24h26'30

HISTORY

55 race(s)

Date		Race	Perf.	Rk
2013
17.08	50km	5th Marquette Trail 50 km	7:24:10 h	30
02.02	50km	25th John Dick Memorial Crusty 50K	5:42:00 h	35
2012
14.10	50km	26th Glacial Trail 50 km Race	5:53:22 h	39
18.08	50km	4th Marquette Trail 50 km	6:38:39 h	14
31.03	30mi	6th Clinton Lake Ultra	5:23:16 h	22
04.02	50km	24th John Dick Memorial Crusty 50K	5:43:33 h	53
2011
20.08	50mi	3rd Marquette Trail 50 Mile	11:50:39 h	8
30.07	50mi	30th Minnesota Voyageur Trail 50 Mile Ultra	12:13:51 h	88
2010
06.11	50mi	28th Mountain Masochist 50 Mile Trail Run	11:54:16 h	208
10.10	50km	24th Glacial Trail 50 km Race	6:07:15 h	39
10.09	50mi	20th Superior Fall Trail Races 50 Mile	15:54:37 h	40
10.07	50mi	7th Dances with Dirt - Devil's Lake 50M Ultra	11:36:30 h	34
05.06	38mi	15th Kettle Moraine 38 Mile Fun Run	9:06:05 h	13
10.04	50km	3rd Chippewa Moraine 50km Ultra Marathon	5:39:48 h	15
06.02	50km	22nd John Dick Memorial Crusty 50K	5:29:34 h	24
2009
07.11	50mi	27th Mountain Masochist 50 Mile Trail Run	10:41:40 h	107
11.10	50mi	23rd Glacial Trail 50 Mile Race	10:08:56 h	16
11.09	50mi	19th Superior Fall Trail Races 50 Mile	15:17:33 h	43
25.07	50mi	28th Minnesota Voyageur Trail 50 Mile Ultra	10:49:20 h	55
11.07	50km	3rd Psycho Psummer Run Toto Run 50K	8:42:13 h	55
09.05	50mi	28th Ice Age Trail 50 Mile Run	10:01:23 h	90
25.04	50km	2nd Chippewa Moraine 50km Ultra Marathon	6:07:41 h	61
07.02	50km	21st John Dick Memorial Crusty 50K	5:41:56 h	25
2008
01.11	50mi	26th Mountain Masochist 50 Mile Trail Run	11:22:14 h	130
12.10	50km	22nd Glacial Trail 50 km Race	6:02:01 h	17
05.09	50mi	18th Superior Fall Trail Races 50 Mile	13:41:58 h	15
23.08	100mi	10th Cascade Crest Classic 100 Mile	30:57:21 h	67
26.07	50mi	27th Minnesota Voyageur Trail 50 Mile Ultra	11:06:23 h	56
10.05	50mi	27th Ice Age Trail 50 Mile Run	10:53:27 h	141
12.04	50km	1st Chippewa Moraine 50km Ultra Marathon	6:30:01 h	41
08.03	60km	5th Land Between The Lakes 60 km Trail Run	7:30:09 h	19
2007
03.11	50mi	25th Mountain Masochist 50 Mile Trail Run	11:47:28 h	210
14.10	50km	21st Glacial Trail 50 km Race	6:03:34 h	43
23.09	50km	4th Rock Cut Hobo 50K	5:31:44 h	31
07.09	50mi	17th Superior Fall Trail Races 50 Mile	12:26:05 h	20
02.06	100mi	12th Kettle Moraine 100 Mile Endurance Run	25:13:27 h	34
12.05	50mi	26th Ice Age Trail 50 Mile Run	10:36:26 h	141
10.03	50mi	4th Land Between The Lakes 50 Mile Trail Run	10:37:48 h	39
03.02	50km	19th John Dick Memorial Crusty 50K	5:47:10 h	19
2006
04.11	50mi	24th Mountain Masochist 50 Mile Trail Run	11:10:13 h	145
08.10	50km	20th Glacial Trail 50 km Race	5:52:49 h	36
08.09	50mi	16th Superior Fall Trail Races 50 Mile	12:15:41 h	21
03.06	100mi	11th Kettle Moraine 100 Mile Endurance Run	24:26:30 h	18
13.05	50mi	25th Ice Age Trail 50 Mile Run	10:05:00 h	102
11.03	60km	3rd Land Between The Lakes 60 km Trail Run	6:58:25 h	36
01.02	50km	18th John Dick Memorial Crusty 50K	5:13:56 h	25
2005
09.10	50km	19th Glacial Trail 50 km Race	5:31:00 h	20
10.09	50mi	15th Superior Fall Trail Races 50 Mile	13:42:32 h	28
14.05	50mi	24th Ice Age Trail 50 Mile Run	10:16:46 h	110
12.02	50km	17th John Dick Memorial Crusty 50K	6:00:29 h	25
2004
16.10	50mi	22th Mountain Masochist 50 Mile Trail Run	11:22:29 h	173
08.05	50mi	23th Ice Age Trail 50 Mile Run	10:53:21 h	164
2003
12.10	50km	17th Glacial Trail 50 km Race	5:46:27 h	25
2000
13.05	50mi	19th Ice Age Trail 50 Mile Run	9:11:22 h	117
1999
08.05	50mi	18th Ice Age Trail 50 Mile Run	9:15:12 h	118

Filter

Runner	Races in common

DUV-index calculation details

#	Date	Race	Credited km	DUV-index+
✓ 1	23/8/2008	10th Cascade Crest Classic 100 Mile	160,93	×3
✓ 2	2/6/2007	12th Kettle Moraine 100 Mile Endurance Run	160,93	×3
✓ 3	3/6/2006	11th Kettle Moraine 100 Mile Endurance Run	160,93	×3
✓ 4	20/8/2011	3rd Marquette Trail 50 Mile	80,47	×1
✓ 5	30/7/2011	30th Minnesota Voyageur Trail 50 Mile Ultra	80,47	×1
✓ 6	6/11/2010	28th Mountain Masochist 50 Mile Trail Run	80,47	×1
✓ 7	10/9/2010	20th Superior Fall Trail Races 50 Mile	80,47	×1
✓ 8	10/7/2010	7th Dances with Dirt - Devil's Lake 50M Ultra	80,47	×1
✓ 9	7/11/2009	27th Mountain Masochist 50 Mile Trail Run	80,47	×1
✓ 10	11/10/2009	23rd Glacial Trail 50 Mile Race	80,47	×1
✓ 11	11/9/2009	19th Superior Fall Trail Races 50 Mile	80,47	×1
✓ 12	25/7/2009	28th Minnesota Voyageur Trail 50 Mile Ultra	80,47	×1
✓ 13	9/5/2009	28th Ice Age Trail 50 Mile Run	80,47	×1
✓ 14	1/11/2008	26th Mountain Masochist 50 Mile Trail Run	80,47	×1
✓ 15	5/9/2008	18th Superior Fall Trail Races 50 Mile	80,47	×1
✓ 16	26/7/2008	27th Minnesota Voyageur Trail 50 Mile Ultra	80,47	×1
✓ 17	10/5/2008	27th Ice Age Trail 50 Mile Run	80,47	×1
✓ 18	3/11/2007	25th Mountain Masochist 50 Mile Trail Run	80,47	×1
✓ 19	7/9/2007	17th Superior Fall Trail Races 50 Mile	80,47	×1
✓ 20	12/5/2007	26th Ice Age Trail 50 Mile Run	80,47	×1
✓ 21	10/3/2007	4th Land Between The Lakes 50 Mile Trail Run	80,47	×1
✓ 22	4/11/2006	24th Mountain Masochist 50 Mile Trail Run	80,47	×1
✓ 23	8/9/2006	16th Superior Fall Trail Races 50 Mile	80,47	×1
✓ 24	13/5/2006	25th Ice Age Trail 50 Mile Run	80,47	×1
✓ 25	10/9/2005	15th Superior Fall Trail Races 50 Mile	80,47	×1
✓ 26	14/5/2005	24th Ice Age Trail 50 Mile Run	80,47	×1
✓ 27	16/10/2004	22th Mountain Masochist 50 Mile Trail Run	80,47	×1
✓ 28	8/5/2004	23th Ice Age Trail 50 Mile Run	80,47	×1
✓ 29	13/5/2000	19th Ice Age Trail 50 Mile Run	80,47	×1
✓ 30	8/5/1999	18th Ice Age Trail 50 Mile Run	80,47	×1
✓ 31	5/6/2010	15th Kettle Moraine 38 Mile Fun Run	61,16	×1
✓ 32	8/3/2008	5th Land Between The Lakes 60 km Trail Run	60,00	×1
✓ 33	11/3/2006	3rd Land Between The Lakes 60 km Trail Run	60,00	×1
✓ 34	17/8/2013	5th Marquette Trail 50 km	50,00	×1
✓ 35	2/2/2013	25th John Dick Memorial Crusty 50K	50,00	×1
✓ 36	14/10/2012	26th Glacial Trail 50 km Race	50,00	×1
✓ 37	18/8/2012	4th Marquette Trail 50 km	50,00	×1
✓ 38	4/2/2012	24th John Dick Memorial Crusty 50K	50,00	×1
✓ 39	10/10/2010	24th Glacial Trail 50 km Race	50,00	×1
✓ 40	10/4/2010	3rd Chippewa Moraine 50km Ultra Marathon	50,00	×1
✓ 41	6/2/2010	22nd John Dick Memorial Crusty 50K	50,00	×1
✓ 42	11/7/2009	3rd Psycho Psummer Run Toto Run 50K	50,00	×1
✓ 43	25/4/2009	2nd Chippewa Moraine 50km Ultra Marathon	50,00	×1
✓ 44	7/2/2009	21st John Dick Memorial Crusty 50K	50,00	×1
✓ 45	12/10/2008	22nd Glacial Trail 50 km Race	50,00	×1
✓ 46	12/4/2008	1st Chippewa Moraine 50km Ultra Marathon	50,00	×1
✓ 47	14/10/2007	21st Glacial Trail 50 km Race	50,00	×1
✓ 48	23/9/2007	4th Rock Cut Hobo 50K	50,00	×1
✓ 49	3/2/2007	19th John Dick Memorial Crusty 50K	50,00	×1
✓ 50	8/10/2006	20th Glacial Trail 50 km Race	50,00	×1
51	1/2/2006	18th John Dick Memorial Crusty 50K	50,00	×1
52	9/10/2005	19th Glacial Trail 50 km Race	50,00	×1
53	12/2/2005	17th John Dick Memorial Crusty 50K	50,00	×1
54	12/10/2003	17th Glacial Trail 50 km Race	50,00	×1
55	31/3/2012	6th Clinton Lake Ultra	48,28	—