Jeff Reifers

Born : 1963 Cat. M60 Ultrarunner since 1996

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 ?

Italy

United States

32,9%

Rank quotient ?This runner's calculation uses 51 eligible race(s): Σ(rank − 1) = 4 629; Σ finishers = 14 088. 4 629 / 14 088 × 100 = 32.86%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed51

Km — ultra races3 637 km

> 100 km4

> 160 km3

Longest race160,9 km

10th Tahoe Rim Trail 100M Endurance Run — 16/7/2011

Km per year (ultra races)

279

2022

2023

150

2024

2025

2026

Race types (share of distance)

Trail100,0%

Records

50 km4h28'09 100 km11h07'37 50 mi7h29'26 100 mi21h43'01

HISTORY

51 race(s)

Date		Race	Perf.	Rk
2024
27.04	100km	11th The Canyons Endurance 100 km Run	18:29:49 h	349
09.03	50km	12th Marin Ultra Challenge 50 km Race	6:14:51 h	112
2023
17.06	46km	8th The Broken Arrow Skyrace	8:48:57 h	386
2022
26.08	101km	16ème Courmayeur-Champex-Chamonix	24:36:23 h	1431
18.06	48km	7th The Broken Arrow Skyrace	7:33:05 h	191
09.04	50mi	14th Lake Sonoma 50 Mile Race	12:49:16 h	198
12.03	50km	10th Marin Ultra Challenge 50 km Race	6:03:07 h	93
2021
17.07	50mi	20th Tahoe Rim Trail 50M Endurance Run	13:56:52 h	48
2019
18.05	50km	34th Silver State 50 km	6:02:24 h	14
27.04	100km	6th The Canyons Endurance 100 km Run	15:54:16 h	139
2018
18.08	100km	4th Castle Peak 100	17:42:07 h	58
19.05	50km	33rd Silver State 50 km	6:10:29 h	23
2016
19.06	54km	1st The Broken Arrow Skyrace	8:52:42 h	86
07.05	50km	3rd The Canyons Endurance 50 km Run	6:34:37 h	9
2015
18.07	50mi	14th Tahoe Rim Trail 50M Endurance Run	12:05:29 h	50
07.03	50km	26th Way Too Cool 50K Endurance Run	5:25:38 h	284
2014
18.05	50km	27th Ohlone 50K Wilderness Run	6:35:06 h	57
2011
16.07	100mi	10th Tahoe Rim Trail 100M Endurance Run	27:11:33 h	21
30.04	50mi	19th Leona Divide 50 Mile Run	9:28:20 h	67
2010
17.07	50mi	9th Tahoe Rim Trail 50M Endurance Runs	11:17:42 h	25
2009
18.07	50mi	8th Tahoe Rim Trail 50M Endurance Runs	11:50:15 h	35
2007
13.10	50mi	25th Dick Collins Firetrails 50 Mile	8:34:32 h	27
10.03	50km	18th Way Too Cool 50K Endurance Run	4:37:33 h	61
2006
21.05	50km	19th Ohlone 50K Wilderness Run	5:54:58 h	15
2004
27.11	28mi	20th Quad Dipsea Trail Run	5:27:38 h	38
2003
18.05	50km	16th Ohlone 50K Wilderness Run	5:34:35 h	8
2002
24.08	31.5mi	5th Tamalpa Headlands 50K	4:52:53 h	33
29.06	100mi	29th Western States 100 Mile Endurance Run	21:43:01 h	33
19.05	50km	15th Ohlone 50K Wilderness Run	4:59:19 h	4
11.05	50mi	19th Quicksilver 50 Mile Endurance Run	8:47:19 h	7
06.04	50mi	23rd American River 50 Mile Endurance Run	7:55:46 h	46
2001
13.10	50mi	19th Dick Collins Firetrails 50 Mile	9:26:00 h	31
25.08	31.5mi	4th Tamalpa Headlands 50K	5:22:19 h	33
07.04	50mi	22nd American River 50 Mile Endurance Run	7:55:46 h	44
10.03	50km	12th Way Too Cool 50K Endurance Run	4:50:48 h	61
09.01	50km	Epiphany Ultras - The Popular But Wussy Metric	4:47:00 h	6
2000
26.08	31.5mi	3rd Tamalpa Headlands 50K	4:53:11 h	9
06.05	100km	5th Miwok 100k Trail race	11:39:20 h	42
01.04	50mi	21st American River 50 Mile Endurance Run	8:29:09 h	49
11.03	50km	11th Way Too Cool 50K Endurance Run	4:34:00 h	34
1999
28.08	31.5mi	2nd Tamalpa Headlands 50K	5:13:10 h	20
26.06	100mi	26th Western States 100 Mile Endurance Run	26:23:52 h	95
01.05	100km	4th Miwok 100k Trail race	11:07:37 h	28
10.04	50mi	20th American River 50 Mile Endurance Run	7:31:50 h	39
13.03	50km	10th Way Too Cool 50K Endurance Run	4:28:09 h	36
1998
10.10	50mi	16th Dick Collins Firetrails 50 Mile	9:12:13 h	26
29.08	31.5mi	1st Tamalpa Headlands 50K	5:17:30 h	26
01.08	50km	17th Skyline 50k Endurance Run	5:36:08 h	61
09.05	50km	15th Quicksilver 50 km Endurance Run	4:39:47 h	23
14.03	50km	9th Way Too Cool 50K Endurance Run	4:41:51 h	39
1996
23.11	50mi	34th JFK 50 Mile	7:29:26 h	30

Filter

Runner	Races in common

DUV-index calculation details

#	Date	Race	Credited km	DUV-index+
✓ 1	16/7/2011	10th Tahoe Rim Trail 100M Endurance Run	160,93	×3
✓ 2	29/6/2002	29th Western States 100 Mile Endurance Run	160,93	×3
✓ 3	26/6/1999	26th Western States 100 Mile Endurance Run	160,93	×3
✓ 4	26/8/2022	16ème Courmayeur-Champex-Chamonix (CCC)	101,00	×2
✓ 5	27/4/2024	11th The Canyons Endurance 100 km Run	100,00	×2
✓ 6	27/4/2019	6th The Canyons Endurance 100 km Run	100,00	×2
✓ 7	18/8/2018	4th Castle Peak 100	100,00	×2
✓ 8	6/5/2000	5th Miwok 100k Trail race	100,00	×2
✓ 9	1/5/1999	4th Miwok 100k Trail race	100,00	×2
✓ 10	9/4/2022	14th Lake Sonoma 50 Mile Race	80,47	×1
✓ 11	17/7/2021	20th Tahoe Rim Trail 50M Endurance Run	80,47	×1
✓ 12	18/7/2015	14th Tahoe Rim Trail 50M Endurance Run	80,47	×1
✓ 13	30/4/2011	19th Leona Divide 50 Mile Run	80,47	×1
✓ 14	17/7/2010	9th Tahoe Rim Trail 50M Endurance Runs	80,47	×1
✓ 15	18/7/2009	8th Tahoe Rim Trail 50M Endurance Runs	80,47	×1
✓ 16	13/10/2007	25th Dick Collins Firetrails 50 Mile	80,47	×1
✓ 17	11/5/2002	19th Quicksilver 50 Mile Endurance Run	80,47	×1
✓ 18	6/4/2002	23rd American River 50 Mile Endurance Run	80,47	×1
✓ 19	13/10/2001	19th Dick Collins Firetrails 50 Mile	80,47	×1
✓ 20	7/4/2001	22nd American River 50 Mile Endurance Run	80,47	×1
✓ 21	1/4/2000	21st American River 50 Mile Endurance Run	80,47	×1
✓ 22	10/4/1999	20th American River 50 Mile Endurance Run	80,47	×1
✓ 23	10/10/1998	16th Dick Collins Firetrails 50 Mile	80,47	×1
✓ 24	23/11/1996	34th JFK 50 Mile	80,47	×1
✓ 25	19/6/2016	1st The Broken Arrow Skyrace	54,00	×1
✓ 26	24/8/2002	5th Tamalpa Headlands 50K	50,69	×1
✓ 27	25/8/2001	4th Tamalpa Headlands 50K	50,69	×1
✓ 28	26/8/2000	3rd Tamalpa Headlands 50K	50,69	×1
✓ 29	28/8/1999	2nd Tamalpa Headlands 50K	50,69	×1
✓ 30	29/8/1998	1st Tamalpa Headlands 50K	50,69	×1
✓ 31	9/3/2024	12th Marin Ultra Challenge 50 km Race	50,00	×1
✓ 32	12/3/2022	10th Marin Ultra Challenge 50 km Race	50,00	×1
✓ 33	18/5/2019	34th Silver State 50 km	50,00	×1
✓ 34	19/5/2018	33rd Silver State 50 km	50,00	×1
✓ 35	7/5/2016	3rd The Canyons Endurance 50 km Run	50,00	×1
✓ 36	7/3/2015	26th Way Too Cool 50K Endurance Run	50,00	×1
✓ 37	18/5/2014	27th Ohlone 50K Wilderness Run	50,00	×1
✓ 38	10/3/2007	18th Way Too Cool 50K Endurance Run	50,00	×1
✓ 39	21/5/2006	19th Ohlone 50K Wilderness Run	50,00	×1
✓ 40	18/5/2003	16th Ohlone 50K Wilderness Run	50,00	×1
✓ 41	19/5/2002	15th Ohlone 50K Wilderness Run	50,00	×1
✓ 42	10/3/2001	12th Way Too Cool 50K Endurance Run	50,00	×1
✓ 43	9/1/2001	Epiphany Ultras - The Popular But Wussy Metric	50,00	×1
✓ 44	11/3/2000	11th Way Too Cool 50K Endurance Run	50,00	×1
✓ 45	13/3/1999	10th Way Too Cool 50K Endurance Run	50,00	×1
✓ 46	1/8/1998	17th Skyline 50k Endurance Run	50,00	×1
✓ 47	9/5/1998	15th Quicksilver 50 km Endurance Run	50,00	×1
✓ 48	14/3/1998	9th Way Too Cool 50K Endurance Run	50,00	×1
49	18/6/2022	7th The Broken Arrow Skyrace	48,00	—
50	17/6/2023	8th The Broken Arrow Skyrace	46,00	—
51	27/11/2004	20th Quad Dipsea Trail Run	45,06	—