Carl Jacob

Born : 1953 Cat. M70 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 ?

United States

77,5%

Rank quotient ?This runner's calculation uses 113 eligible race(s): Σ(rank − 1) = 16 696; Σ finishers = 21 530. 16 696 / 21 530 × 100 = 77.55%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed113

Km — ultra races5 909 km

Longest race100,0 km

31st Quicksilver 100 km Endurance Run — 10/5/2014

Km per year (ultra races)

250

2022

227

2023

270

2024

201

2025

170

2026

Race types (share of distance)

Road36,7%

Trail63,3%

Records

50 km5h23'24 100 km16h48'13 50 mi9h28'41 12 h76,07 km

HISTORY

113 race(s)

Date		Race	Perf.	Rk
2026
15.08	31.5mi	25th Tamalpa Headlands 50K	10:30:57 h	258
13.06	12h	5th SF Half Day 12h	69.443 km	21
31.01	50km	48th Jed Smith Ultra Classic - 50 km Race	7:13:53 h	45
2025
11.10	50km	39th Ruth Anderson Ultra 50km	7:17:30 h	38
16.08	31.5mi	24th Tamalpa Headlands 50K	9:18:51 h	247
03.08	50km	44th Skyline 50k Endurance Run	8:58:39 h	148
01.02	50km	47th Jed Smith Ultra Classic - 50 km Race	7:07:24 h	34
2024
12.10	50km	38th Ruth Anderson Ultra 50km	7:17:46 h	60
17.08	31.5mi	23rd Tamalpa Headlands 50K	9:13:26 h	205
04.08	50km	43rd Skyline 50k Endurance Run	9:14:24 h	157
15.06	12h	3rd SF Half Day 12h	69.451 km	23
03.02	50km	46th Jed Smith Ultra Classic - 50 km Race	6:42:46 h	47
2023
19.08	31.5mi	22nd Tamalpa Headlands 50K	9:23:50 h	243
17.06	12h	2nd SF Half Day 12h	76.065 km	21
18.02	50km	11th FOURmidable 50K	8:56:28 h	209
04.02	50km	45th Jed Smith Ultra Classic - 50 km Race	6:33:34 h	47
2022
08.10	50km	36th Ruth Anderson Ultra 50km	6:44:54 h	43
07.08	50km	41st Skyline 50k Endurance Run	8:41:26 h	175
14.05	50km	39th Quicksilver 50 km Endurance Run	9:11:51 h	114
05.03	50km	32nd Way Too Cool 50K Endurance Run	7:19:26 h	434
05.02	50km	44th Jed Smith Ultra Classic - 50 km Race	6:40:41 h	27
2021
09.10	50km	35th Ruth Anderson Ultra 50km	6:47:59 h	26
01.08	50km	40th Skyline 50k Endurance Run	8:34:30 h	191
16.05	50km	1st Tamalpa 50K	6:03:49 h	10
27.02	50km	43rd Jed Smith Ultra Classic - 50 km Race	6:14:47 h	26
2020
07.03	50km	31st Way Too Cool 50K Endurance Run	6:59:02 h	430
01.02	50km	42nd Jed Smith Ultra Classic - 50 km Race	5:55:41 h	37
2019
12.10	50km	33th Ruth Anderson Ultra 50km	6:12:08 h	18
02.03	50km	30th Way Too Cool 50K Endurance Run	7:32:10 h	472
02.02	50km	41st Jed Smith Ultra Classic - 50 km Race	6:03:42 h	36
2018
25.08	31.5mi	19th Tamalpa Headlands 50K	8:19:57 h	142
05.08	50km	37th Skyline 50k Endurance Run	7:40:15 h	134
12.05	50km	35th Quicksilver 50 km Endurance Run	8:10:49 h	112
22.04	50mi	32th Ruth Anderson Ultra 50mi	10:36:54 h	11
03.03	50km	29th Way Too Cool 50K Endurance Run	7:09:04 h	446
03.02	50km	40th Jed Smith Ultra Classic - 50 km Race	6:10:55 h	31
2017
26.08	31.5mi	18th Tamalpa Headlands 50K	8:23:49 h	128
06.08	50km	36th Skyline 50k Endurance Run	7:37:54 h	159
13.05	50km	34th Quicksilver 50 km Endurance Run	7:06:10 h	55
23.04	50mi	31th Ruth Anderson Ultra 50mi	9:28:41 h	5
04.03	50km	28th Way Too Cool 50K Endurance Run	6:45:13 h	436
04.02	50km	39th Jed Smith Ultra Classic - 50 km Race	5:23:24 h	31
2016
27.08	31.5mi	17th Tamalpa Headlands 50K	7:19:21 h	162
07.08	50km	35th Skyline 50k Endurance Run	7:07:13 h	119
05.03	50km	27th Way Too Cool 50K Endurance Run	7:20:29 h	636
06.02	50km	38th Jed Smith Ultra Classic - 50 km Race	5:55:11 h	50
2015
29.08	31.5mi	16th Tamalpa Headlands 50K	7:37:48 h	177
08.08	50km	34th Skyline 50k Endurance Run	7:00:27 h	115
18.04	50mi	29th Ruth Anderson Ultra 50mi	10:06:32 h	9
07.03	50km	26th Way Too Cool 50K Endurance Run	6:57:01 h	732
2014
29.11	28mi	30th Quad Dipsea Trail Run	7:29:51 h	181
23.08	31.5mi	15th Tamalpa Headlands 50K	7:48:41 h	156
10.05	100km	31st Quicksilver 100 km Endurance Run	16:48:13 h	78
19.04	50mi	28th Ruth Anderson Ultra 50mi	10:14:31 h	17
08.03	50km	25th Way Too Cool 50K Endurance Run	6:40:19 h	683
01.02	50km	36th Jed Smith Ultra Classic - 50 km Race	5:40:43 h	59
2013
30.11	28mi	29th Quad Dipsea Trail Run	7:27:15 h	197
12.10	50mi	31st Dick Collins Firetrails 50 Mile	11:52:35 h	238
11.08	50km	32nd Skyline 50k Endurance Run	6:39:12 h	175
11.05	50km	30th Quicksilver 50 km Endurance Run	7:31:28 h	78
20.04	50mi	27th Ruth Anderson Ultra 50mi	9:57:23 h	15
02.02	50km	35th Jed Smith Ultra Classic - 50 km Race	5:38:19 h	63
2012
24.11	28mi	28th Quad Dipsea Trail Run	7:55:49 h	182
25.08	31.5mi	13th Tamalpa Headlands 50K	7:04:16 h	112
12.08	50km	31st Skyline 50k Endurance Run	6:52:25 h	160
20.05	50km	25th Ohlone 50K Wilderness Run	10:30:13 h	208
10.03	50km	23rd Way Too Cool 50K Endurance Run	7:25:51 h	656
04.02	50km	34th Jed Smith Ultra Classic - 50 km Race	6:16:57 h	67
2011
26.11	28mi	27th Quad Dipsea Trail Run	8:13:15 h	217
12.11	50km	1st Last Chance 50 km	6:04:58 h	23
22.05	50km	24th Ohlone 50K Wilderness Run	8:34:10 h	163
30.04	50km	28th Quicksilver 50 km Endurance Run	7:14:03 h	76
23.04	50km	25th Ruth Anderson Ultra 50km	5:54:32 h	20
12.03	50km	22nd Way Too Cool 50K Endurance Run	6:50:37 h	418
05.02	50km	33rd Jed Smith Ultra Classic - 50 km Race	5:45:34 h	35
2010
04.12	50km	4th Endurance Challenge - California Trail 50 km	7:48:38 h	208
27.11	28mi	26th Quad Dipsea Trail Run	7:28:36 h	165
06.11	50km	15th Helen Klein Ultra Classic 50km	6:27:38 h	19
01.08	50km	29th Skyline 50k Endurance Run	6:44:59 h	125
23.05	50km	23rd Ohlone 50K Wilderness Run	8:19:55 h	152
08.05	50km	27th Quicksilver 50 km Endurance Run	6:53:52 h	57
17.04	50km	24th Ruth Anderson Ultra 50km	5:54:58 h	31
06.02	50km	32nd Jed Smith Ultra Classic - 50 km Race	5:54:23 h	35
2009
05.12	50km	3rd Endurance Challenge - California Trail 50 km	7:28:16 h	106
28.11	28mi	25th Quad Dipsea Trail Run	7:17:31 h	159
02.08	50km	28th Skyline 50k Endurance Run	6:48:40 h	101
31.05	50km	22nd Ohlone 50K Wilderness Run	8:58:28 h	127
18.04	50km	23th Ruth Anderson Ultra 50km	6:35:10 h	31
14.03	50km	20th Way Too Cool 50K Endurance Run	7:08:45 h	379
2008
29.11	28mi	24th Quad Dipsea Trail Run	7:16:44 h	183
23.08	31.5mi	11th Tamalpa Headlands 50K	6:51:57 h	43
03.08	50km	27th Skyline 50k Endurance Run	6:22:51 h	84
10.05	50km	25th Quicksilver 50 km Endurance Run	6:55:35 h	68
19.04	50km	22th Ruth Anderson Ultra 50km	5:46:57 h	16
08.03	50km	19th Way Too Cool 50K Endurance Run	6:34:00 h	335
2007
24.11	28mi	23rd Quad Dipsea Trail Run	7:10:32 h	185
26.08	31.5mi	10th Tamalpa Headlands 50K	7:56:22 h	116
05.08	50km	26th Skyline 50k Endurance Run	6:30:04 h	95
31.03	50km	21th Ruth Anderson Ultra 50km	6:11:47 h	34
10.03	50km	18th Way Too Cool 50K Endurance Run	7:11:04 h	386
2006
26.08	31.5mi	9th Tamalpa Headlands 50K	7:31:56 h	140
06.08	50km	25th Skyline 50k Endurance Run	6:49:29 h	101
22.04	50km	20th Ruth Anderson Ultra 50km	6:12:58 h	21
11.03	50km	17th Way Too Cool 50K Endurance Run	7:17:20 h	324
2005
26.11	28mi	21st Quad Dipsea Trail Run	7:52:27 h	197
27.08	31.5mi	8th Tamalpa Headlands 50K	7:41:07 h	144
07.08	50km	24th Skyline 50k Endurance Run	6:36:37 h	94
16.04	50km	19th Ruth Anderson Ultra 50km	5:46:40 h	15
12.03	50km	16th Way Too Cool 50K Endurance Run	6:56:10 h	351
2004
27.11	28mi	20th Quad Dipsea Trail Run	7:01:11 h	140
21.08	31.5mi	7th Tamalpa Headlands 50K	6:44:13 h	79
17.04	50km	18th Ruth Anderson Ultra 50km	6:08:19 h	16
2003
23.08	31.5mi	6th Tamalpa Headlands 50K	7:10:30 h	138

Filter

Runner	Races in common

DUV-index calculation details

#	Date	Race	Credited km	DUV-index+
✓ 1	10/5/2014	31st Quicksilver 100 km Endurance Run	100,00	×2
✓ 2	22/4/2018	32th Ruth Anderson Ultra 50mi	80,47	×1
✓ 3	23/4/2017	31th Ruth Anderson Ultra 50mi	80,47	×1
✓ 4	18/4/2015	29th Ruth Anderson Ultra 50mi	80,47	×1
✓ 5	19/4/2014	28th Ruth Anderson Ultra 50mi	80,47	×1
✓ 6	12/10/2013	31st Dick Collins Firetrails 50 Mile	80,47	×1
✓ 7	20/4/2013	27th Ruth Anderson Ultra 50mi	80,47	×1
✓ 8	17/6/2023	2nd SF Half Day 12h	76,07	×1
✓ 9	15/6/2024	3rd SF Half Day 12h	69,45	×1
✓ 10	13/6/2026	5th SF Half Day 12h	69,44	×1
✓ 11	15/8/2026	25th Tamalpa Headlands 50K	50,69	×1
✓ 12	16/8/2025	24th Tamalpa Headlands 50K	50,69	×1
✓ 13	17/8/2024	23rd Tamalpa Headlands 50K	50,69	×1
✓ 14	19/8/2023	22nd Tamalpa Headlands 50K	50,69	×1
✓ 15	25/8/2018	19th Tamalpa Headlands 50K	50,69	×1
✓ 16	26/8/2017	18th Tamalpa Headlands 50K	50,69	×1
✓ 17	27/8/2016	17th Tamalpa Headlands 50K	50,69	×1
✓ 18	29/8/2015	16th Tamalpa Headlands 50K	50,69	×1
✓ 19	23/8/2014	15th Tamalpa Headlands 50K	50,69	×1
✓ 20	25/8/2012	13th Tamalpa Headlands 50K	50,69	×1
✓ 21	23/8/2008	11th Tamalpa Headlands 50K	50,69	×1
✓ 22	26/8/2007	10th Tamalpa Headlands 50K	50,69	×1
✓ 23	26/8/2006	9th Tamalpa Headlands 50K	50,69	×1
✓ 24	27/8/2005	8th Tamalpa Headlands 50K	50,69	×1
✓ 25	21/8/2004	7th Tamalpa Headlands 50K	50,69	×1
✓ 26	23/8/2003	6th Tamalpa Headlands 50K	50,69	×1
✓ 27	31/1/2026	48th Jed Smith Ultra Classic - 50 km Race	50,00	×1
✓ 28	11/10/2025	39th Ruth Anderson Ultra 50km	50,00	×1
✓ 29	3/8/2025	44th Skyline 50k Endurance Run	50,00	×1
✓ 30	1/2/2025	47th Jed Smith Ultra Classic - 50 km Race	50,00	×1
✓ 31	12/10/2024	38th Ruth Anderson Ultra 50km	50,00	×1
✓ 32	4/8/2024	43rd Skyline 50k Endurance Run	50,00	×1
✓ 33	3/2/2024	46th Jed Smith Ultra Classic - 50 km Race	50,00	×1
✓ 34	18/2/2023	11th FOURmidable 50K	50,00	×1
✓ 35	4/2/2023	45th Jed Smith Ultra Classic - 50 km Race	50,00	×1
✓ 36	8/10/2022	36th Ruth Anderson Ultra 50km	50,00	×1
✓ 37	7/8/2022	41st Skyline 50k Endurance Run	50,00	×1
✓ 38	14/5/2022	39th Quicksilver 50 km Endurance Run	50,00	×1
✓ 39	5/3/2022	32nd Way Too Cool 50K Endurance Run	50,00	×1
✓ 40	5/2/2022	44th Jed Smith Ultra Classic - 50 km Race	50,00	×1
✓ 41	9/10/2021	35th Ruth Anderson Ultra 50km	50,00	×1
✓ 42	1/8/2021	40th Skyline 50k Endurance Run	50,00	×1
✓ 43	16/5/2021	1st Tamalpa 50K	50,00	×1
✓ 44	27/2/2021	43rd Jed Smith Ultra Classic - 50 km Race	50,00	×1
✓ 45	7/3/2020	31st Way Too Cool 50K Endurance Run	50,00	×1
✓ 46	1/2/2020	42nd Jed Smith Ultra Classic - 50 km Race	50,00	×1
✓ 47	12/10/2019	33th Ruth Anderson Ultra 50km	50,00	×1
✓ 48	2/3/2019	30th Way Too Cool 50K Endurance Run	50,00	×1
✓ 49	2/2/2019	41st Jed Smith Ultra Classic - 50 km Race	50,00	×1
✓ 50	5/8/2018	37th Skyline 50k Endurance Run	50,00	×1
51	12/5/2018	35th Quicksilver 50 km Endurance Run	50,00	×1
52	3/3/2018	29th Way Too Cool 50K Endurance Run	50,00	×1
53	3/2/2018	40th Jed Smith Ultra Classic - 50 km Race	50,00	×1
54	6/8/2017	36th Skyline 50k Endurance Run	50,00	×1
55	13/5/2017	34th Quicksilver 50 km Endurance Run	50,00	×1
56	4/3/2017	28th Way Too Cool 50K Endurance Run	50,00	×1
57	4/2/2017	39th Jed Smith Ultra Classic - 50 km Race	50,00	×1
58	7/8/2016	35th Skyline 50k Endurance Run	50,00	×1
59	5/3/2016	27th Way Too Cool 50K Endurance Run	50,00	×1
60	6/2/2016	38th Jed Smith Ultra Classic - 50 km Race	50,00	×1
61	8/8/2015	34th Skyline 50k Endurance Run	50,00	×1
62	7/3/2015	26th Way Too Cool 50K Endurance Run	50,00	×1
63	8/3/2014	25th Way Too Cool 50K Endurance Run	50,00	×1
64	1/2/2014	36th Jed Smith Ultra Classic - 50 km Race	50,00	×1
65	11/8/2013	32nd Skyline 50k Endurance Run	50,00	×1
66	11/5/2013	30th Quicksilver 50 km Endurance Run	50,00	×1
67	2/2/2013	35th Jed Smith Ultra Classic - 50 km Race	50,00	×1
68	12/8/2012	31st Skyline 50k Endurance Run	50,00	×1
69	20/5/2012	25th Ohlone 50K Wilderness Run	50,00	×1
70	10/3/2012	23rd Way Too Cool 50K Endurance Run	50,00	×1
71	4/2/2012	34th Jed Smith Ultra Classic - 50 km Race	50,00	×1
72	12/11/2011	1st Last Chance 50 km	50,00	×1
73	22/5/2011	24th Ohlone 50K Wilderness Run	50,00	×1
74	30/4/2011	28th Quicksilver 50 km Endurance Run	50,00	×1
75	23/4/2011	25th Ruth Anderson Ultra 50km	50,00	×1
76	12/3/2011	22nd Way Too Cool 50K Endurance Run	50,00	×1
77	5/2/2011	33rd Jed Smith Ultra Classic - 50 km Race	50,00	×1
78	4/12/2010	4th Endurance Challenge - California Trail 50 km	50,00	×1
79	6/11/2010	15th Helen Klein Ultra Classic 50km	50,00	×1
80	1/8/2010	29th Skyline 50k Endurance Run	50,00	×1
81	23/5/2010	23rd Ohlone 50K Wilderness Run	50,00	×1
82	8/5/2010	27th Quicksilver 50 km Endurance Run	50,00	×1
83	17/4/2010	24th Ruth Anderson Ultra 50km	50,00	×1
84	6/2/2010	32nd Jed Smith Ultra Classic - 50 km Race	50,00	×1
85	5/12/2009	3rd Endurance Challenge - California Trail 50 km	50,00	×1
86	2/8/2009	28th Skyline 50k Endurance Run	50,00	×1
87	31/5/2009	22nd Ohlone 50K Wilderness Run	50,00	×1
88	18/4/2009	23th Ruth Anderson Ultra 50km	50,00	×1
89	14/3/2009	20th Way Too Cool 50K Endurance Run	50,00	×1
90	3/8/2008	27th Skyline 50k Endurance Run	50,00	×1
91	10/5/2008	25th Quicksilver 50 km Endurance Run	50,00	×1
92	19/4/2008	22th Ruth Anderson Ultra 50km	50,00	×1
93	8/3/2008	19th Way Too Cool 50K Endurance Run	50,00	×1
94	5/8/2007	26th Skyline 50k Endurance Run	50,00	×1
95	31/3/2007	21th Ruth Anderson Ultra 50km	50,00	×1
96	10/3/2007	18th Way Too Cool 50K Endurance Run	50,00	×1
97	6/8/2006	25th Skyline 50k Endurance Run	50,00	×1
98	22/4/2006	20th Ruth Anderson Ultra 50km	50,00	×1
99	11/3/2006	17th Way Too Cool 50K Endurance Run	50,00	×1
100	7/8/2005	24th Skyline 50k Endurance Run	50,00	×1
101	16/4/2005	19th Ruth Anderson Ultra 50km	50,00	×1
102	12/3/2005	16th Way Too Cool 50K Endurance Run	50,00	×1
103	17/4/2004	18th Ruth Anderson Ultra 50km	50,00	×1
104	29/11/2014	30th Quad Dipsea Trail Run	45,06	—
105	30/11/2013	29th Quad Dipsea Trail Run	45,06	—
106	24/11/2012	28th Quad Dipsea Trail Run	45,06	—
107	26/11/2011	27th Quad Dipsea Trail Run	45,06	—
108	27/11/2010	26th Quad Dipsea Trail Run	45,06	—
109	28/11/2009	25th Quad Dipsea Trail Run	45,06	—
110	29/11/2008	24th Quad Dipsea Trail Run	45,06	—
111	24/11/2007	23rd Quad Dipsea Trail Run	45,06	—
112	26/11/2005	21st Quad Dipsea Trail Run	45,06	—
113	27/11/2004	20th Quad Dipsea Trail Run	45,06	—