Jean-Luc Szpakowski

Born : 1948 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 ?

France

United States

45,8%

Rank quotient ?This runner's calculation uses 56 eligible race(s): Σ(rank − 1) = 5 097; Σ finishers = 11 139. 5 097 / 11 139 × 100 = 45.76%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed56

Km — ultra races4 115 km

> 100 km6

> 160 km3

Longest race160,9 km

30th Western States 100 Mile Endurance Run — 28/6/2003

Km per year (ultra races)

2022

145

2023

2024

2025

100

2026

Race types (share of distance)

Road5,1%

Trail94,9%

Records

50 km4h38'10 50 mi7h00'59 100 mi27h24'08

HISTORY

56 race(s)

Date		Race	Perf.	Rk
2026
02.08	50km	45th Skyline 50k Endurance Run	8:27:14 h	154
11.04	50km	12th SPASM Lake Chabot 50 km	7:27:52 h	15
2024
29.06	50km	18ème Sri Chinmoy 50km Lauf Paris	6:20:43 h	37
2023
03.09	50km	13th Crystal Springs 50 km Summer Trail Run	7:47:25 h	35
06.08	50km	42nd Skyline 50k Endurance Run	8:03:15 h	103
18.03	45km	13ème EcoTrail de Paris - Ile de France 45 km	6:34:26 h	1331
2022
17.12	50km	11th Woodside Ramble 50K - Winter	7:39:59 h	72
2009
02.08	50km	28th Skyline 50k Endurance Run	6:31:39 h	95
2004
09.10	50mi	22nd Dick Collins Firetrails 50 Mile	11:42:50 h	103
01.08	50km	23rd Skyline 50k Endurance Run	7:12:45 h	138
2003
28.06	100mi	30th Western States 100 Mile Endurance Run	27:57:47 h	183
05.04	50mi	24th American River 50 Mile Endurance Run	9:30:45 h	191
2002
12.10	50mi	20th Dick Collins Firetrails 50 Mile	10:49:41 h	73
2001
05.08	50km	20th Skyline 50k Endurance Run	6:32:46 h	143
23.06	100mi	28th Western States 100 Mile Endurance Run	27:24:08 h	151
07.04	50mi	22nd American River 50 Mile Endurance Run	9:00:29 h	105
10.03	50km	12th Way Too Cool 50K Endurance Run	5:09:51 h	104
2000
14.10	50mi	18th Dick Collins Firetrails 50 Mile	9:24:43 h	29
24.06	100mi	27th Western States 100 Mile Endurance Run	28:39:45 h	150
01.04	50mi	21st American River 50 Mile Endurance Run	8:57:35 h	80
11.03	50km	11th Way Too Cool 50K Endurance Run	5:37:37 h	152
11.01	49mi	Epiphany Ultras - The Real Deal	9:35:00 h	13
1999
28.08	31.5mi	2nd Tamalpa Headlands 50K	5:30:00 h	32
10.04	50mi	20th American River 50 Mile Endurance Run	8:58:43 h	158
13.03	50km	10th Way Too Cool 50K Endurance Run	5:21:33 h	137
09.01	48km	Epiphany Ultras - The Popular But Wussy Metric	5:27:00 h	11
1998
28.11	28mi	14th Quad Dipsea Trail Run	5:57:28 h	72
10.10	50mi	16th Dick Collins Firetrails 50 Mile	9:56:42 h	37
01.08	50km	17th Skyline 50k Endurance Run	5:26:50 h	53
1997
02.08	50km	16th Skyline 50k Endurance Run	5:15:53 h	61
1996
03.08	50km	15th Skyline 50k Endurance Run	6:02:26 h	108
1995
14.10	50mi	13th Dick Collins Firetrails 50 Mile	9:21:22 h	22
1994
26.11	28mi	10th Quad Dipsea Trail Run	5:57:44 h	67
08.10	50mi	12th Dick Collins Firetrails 50 Mile	9:02:02 h	14
07.08	50km	13th Skyline 50k Endurance Run	5:04:57 h	39
1993
01.08	50km	12th Skyline 50k Endurance Run	5:34:54 h	44
1992
02.08	50km	11th Skyline 50k Endurance Run	4:42:10 h	13
1991
03.08	50km	10th Skyline 50k Endurance Run	4:39:24 h	8
1990
13.10	50mi	8th Dick Collins Firetrails 50 Mile	8:21:58 h	9
04.08	50km	9th Skyline 50k Endurance Run	4:52:18 h	15
1988
06.02	50mi	10th Jed Smith Ultra Classic - 50 Mile Race	7:18:12 h	22
1987
27.11	28mi	3rd Quad Dipsea Trail Run	5:45:21 h	39
12.04	50mi	8th American River 50 Mile Endurance Run	7:41:39 h	50
28.03	52.4mi	The Forty-Niner Double Marathon Trail Run	7:53:54 h	12
1986
03.08	50km	5th Skyline 50k Endurance Run	4:38:10 h	11
1985
11.05	50mi	2nd Quicksilver 50 Mile Endurance Run	8:28:03 h	11
06.04	52.4mi	The Forty-Niner Double Marathon Trail Run	8:19:34 h	17
1984
23.06	93.5mi	11th Western States 100 Mile Endurance Run	20:36:00 h	33
1983
11.09	50mi	Drake's Bay 50 Mile Run	10:25:00 h	10
25.06	93.5mi	10th Western States 100 Mile Endurance Run	23:32:00 h	86
17.04	50mi	4th American River 50 Mile Endurance Run	9:38:44 h	264
1982
02.10	48.6mi	Cow Mountain Planet Earth Run	7:39:20 h	19
26.06	93.5mi	9th Western States 100 Mile Endurance Run	27:36:00 h	124
18.04	50mi	3rd American River 50 Mile Endurance Run	8:32:17 h	74
1981
07.11	50mi	Challenge Cup 50	7:00:59 h	8
03.10	48.6mi	Cow Mountain Planet Earth Run	8:03:16 h	16

Filter

Runner	Races in common

DUV-index calculation details

#	Date	Race	Credited km	DUV-index+
✓ 1	28/6/2003	30th Western States 100 Mile Endurance Run	160,93	×3
✓ 2	23/6/2001	28th Western States 100 Mile Endurance Run	160,93	×3
✓ 3	24/6/2000	27th Western States 100 Mile Endurance Run	160,93	×3
✓ 4	23/6/1984	11th Western States 100 Mile Endurance Run	150,47	×3
✓ 5	25/6/1983	10th Western States 100 Mile Endurance Run	150,47	×3
✓ 6	26/6/1982	9th Western States 100 Mile Endurance Run	150,47	×3
✓ 7	28/3/1987	The Forty-Niner Double Marathon Trail Run	84,33	×1
✓ 8	6/4/1985	The Forty-Niner Double Marathon Trail Run	84,33	×1
✓ 9	9/10/2004	22nd Dick Collins Firetrails 50 Mile	80,47	×1
✓ 10	5/4/2003	24th American River 50 Mile Endurance Run	80,47	×1
✓ 11	12/10/2002	20th Dick Collins Firetrails 50 Mile	80,47	×1
✓ 12	7/4/2001	22nd American River 50 Mile Endurance Run	80,47	×1
✓ 13	14/10/2000	18th Dick Collins Firetrails 50 Mile	80,47	×1
✓ 14	1/4/2000	21st American River 50 Mile Endurance Run	80,47	×1
✓ 15	10/4/1999	20th American River 50 Mile Endurance Run	80,47	×1
✓ 16	10/10/1998	16th Dick Collins Firetrails 50 Mile	80,47	×1
✓ 17	14/10/1995	13th Dick Collins Firetrails 50 Mile	80,47	×1
✓ 18	8/10/1994	12th Dick Collins Firetrails 50 Mile	80,47	×1
✓ 19	13/10/1990	8th Dick Collins Firetrails 50 Mile	80,47	×1
✓ 20	6/2/1988	10th Jed Smith Ultra Classic - 50 Mile Race	80,47	×1
✓ 21	12/4/1987	8th American River 50 Mile Endurance Run	80,47	×1
✓ 22	11/5/1985	2nd Quicksilver 50 Mile Endurance Run	80,47	×1
✓ 23	11/9/1983	Drake's Bay 50 Mile Run	80,47	×1
✓ 24	17/4/1983	4th American River 50 Mile Endurance Run	80,47	×1
✓ 25	18/4/1982	3rd American River 50 Mile Endurance Run	80,47	×1
✓ 26	7/11/1981	Challenge Cup 50	80,47	×1
✓ 27	11/1/2000	Epiphany Ultras - The Real Deal	78,86	×1
✓ 28	2/10/1982	Cow Mountain Planet Earth Run	78,21	×1
✓ 29	3/10/1981	Cow Mountain Planet Earth Run	78,21	×1
✓ 30	28/8/1999	2nd Tamalpa Headlands 50K	50,69	×1
✓ 31	2/8/2026	45th Skyline 50k Endurance Run	50,00	×1
✓ 32	11/4/2026	12th SPASM Lake Chabot 50 km	50,00	×1
✓ 33	29/6/2024	18ème Sri Chinmoy 50km Lauf Paris	50,00	×1
✓ 34	3/9/2023	13th Crystal Springs 50 km Summer Trail Run	50,00	×1
✓ 35	6/8/2023	42nd Skyline 50k Endurance Run	50,00	×1
✓ 36	17/12/2022	11th Woodside Ramble 50K - Winter	50,00	×1
✓ 37	2/8/2009	28th Skyline 50k Endurance Run	50,00	×1
✓ 38	1/8/2004	23rd Skyline 50k Endurance Run	50,00	×1
✓ 39	5/8/2001	20th Skyline 50k Endurance Run	50,00	×1
✓ 40	10/3/2001	12th Way Too Cool 50K Endurance Run	50,00	×1
✓ 41	11/3/2000	11th Way Too Cool 50K Endurance Run	50,00	×1
✓ 42	13/3/1999	10th Way Too Cool 50K Endurance Run	50,00	×1
✓ 43	1/8/1998	17th Skyline 50k Endurance Run	50,00	×1
✓ 44	2/8/1997	16th Skyline 50k Endurance Run	50,00	×1
✓ 45	3/8/1996	15th Skyline 50k Endurance Run	50,00	×1
✓ 46	7/8/1994	13th Skyline 50k Endurance Run	50,00	×1
✓ 47	1/8/1993	12th Skyline 50k Endurance Run	50,00	×1
✓ 48	2/8/1992	11th Skyline 50k Endurance Run	50,00	×1
✓ 49	3/8/1991	10th Skyline 50k Endurance Run	50,00	×1
✓ 50	4/8/1990	9th Skyline 50k Endurance Run	50,00	×1
51	3/8/1986	5th Skyline 50k Endurance Run	50,00	×1
52	9/1/1999	Epiphany Ultras - The Popular But Wussy Metric	48,00	—
53	28/11/1998	14th Quad Dipsea Trail Run	45,06	—
54	26/11/1994	10th Quad Dipsea Trail Run	45,06	—
55	27/11/1987	3rd Quad Dipsea Trail Run	45,06	—
56	18/3/2023	13ème EcoTrail de Paris - Ile de France 45 km	45,00	—