Jennifer O'Connor

Born : 1968 Cat. W55 Ultrarunner since 2004

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 ?

Ireland

United States

60,1%

Rank quotient ?This runner's calculation uses 74 eligible race(s): Σ(rank − 1) = 4 834; Σ finishers = 8 045. 4 834 / 8 045 × 100 = 60.09%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed74

Km — ultra races5 566 km

> 100 km10

> 160 km8

> 24h2

Longest race160,9 km

10th Tunnel Hill 100 Mile Race — 11/11/2023

Km per year (ultra races)

472

2022

543

2023

180

2024

312

2025

263

2026

Race types (share of distance)

Road21,0%

Trail79,0%

Wins & podiums (ultra)

🏆 Win0

🏆 Win F3

🏅 Top 30

🏅 Top 3 F13

Longest winning streak0

Current streak0

Records

50 km5h24'57 100 km18h11'26 50 mi9h50'53 100 mi23h47'42 6 h51,47 km 12 h101,07 km 24 h146,85 km

HISTORY

74 race(s)

Date		Race	Perf.	Rk
2026
11.07	12h	17th Dirty Dozen 12h Endurance Run	82.688 km	6
04.04	50mi	46th American River 50 Mile Endurance Run	12:52:09 h	109
14.03	50km	14th Marin Ultra Challenge 50 km Race	7:05:08 h	129
07.02	50km	14th Fort Ord 50K Trail Run	7:06:13 h	51
2025
31.12	12h	15th New Years One Day 12 Hour Run	81.352 km	7
07.06	50km	40th Silver State 50 km	8:55:05 h	62
12.04	50mi	32nd Leona Divide 50 Mile Run	15:16:43 h	64
08.03	50km	13th Marin Ultra Challenge 50 km Race	6:50:31 h	137
15.02	50km	12th Chabot Trail Run	7:02:22 h	29
2024
08.06	50km	15th Cinderella 50 km Spring Trail Run	8:39:32 h	22
09.03	50km	12th Marin Ultra Challenge 50 km Race	7:18:05 h	175
27.01	50miles	1st Monterey Ultra	12:25:39 h	45
2023
31.12	6h	13th New Years One Day 6 Hour Run	51.471 km	16
09.12	50km	15th Hunter S. Thompson Fear & Loathing 50 km	6:54:00 h	49
11.11	100mi	10th Tunnel Hill 100 Mile Race	23:47:42 h	91
14.10	50km	37th Ruth Anderson Ultra 50km	5:24:57 h	33
06.08	50km	42nd Skyline 50k Endurance Run	7:01:59 h	69
10.06	50mi	13th Cool Moon 50 Mile Endurance Run	13:40:40 h	21
04.03	50km	33rd Way Too Cool 50K Endurance Run	7:27:00 h	313
28.01	50km	11th Fort Ord 50K Trail Run	6:39:27 h	52
2022
31.12	24h	12th New Years One Day 24 Hour Run	81.026 km	19
04.12	50km	14th Hunter S. Thompson Fear & Loathing 50 km	6:11:00 h	10
05.11	50km	22th Rio Del Lago 50 km Race	6:18:00 h	20
15.07	100mi	2nd The Yeti 100 Mile Endurance Run-Washington	28:12:30 h	31
23.04	50mi	29th Leona Divide 50 Mile Run	13:58:19 h	74
05.03	50km	32nd Way Too Cool 50K Endurance Run	6:56:50 h	374
2021
31.12	12h	11th New Years One Day 12 Hour Run	67.753 km	18
05.12	50km	13th Hunter S. Thompson Fear & Loathing 50 km	7:05:00 h	25
09.10	50km	35th Ruth Anderson Ultra 50km	5:50:11 h	18
24.07	50mi	15th Burning River 50 Mile Endurance Run	14:08:49 h	237
05.02	100mi	3rd Grandmaster Ultras 100 Mile Run	32:39:43 h	15
2020
08.02	50km	10th Golden Gate 50 km Winter Trail Run	7:23:39 h	24
2019
31.12	12h	10th New Years One Day 12 Hour Run	83.524 km	15
02.11	100mi	19th Rio Del Lago 100 Mile Endurance Run	29:19:55 h	212
28.09	50mi	6th Overlook Endurance Run 50M	12:20:28 h	29
04.08	50km	38th Skyline 50k Endurance Run	6:21:53 h	79
18.05	50mi	34th Silver State 50 Mile	13:44:32 h	72
14.04	63.5km	16th Connemara Int. Ultramarathon	7:05:38 h	113
09.03	50mi	8th Marin Ultra Challenge 50 Mile Race	11:28:15 h	108
02.02	50km	7th Fort Ord 50K Trail Run	6:08:01 h	39
2018
27.10	100mi	16th Javelina Jundred 100 Mile Endurance Run	27:20:38 h	249
18.08	100km	17th Waldo 100K Trail Run	18:11:26 h	98
19.05	50mi	6th San Francisco 50 Mile Endurance Run	12:22:01 h	22
22.04	50mi	32th Ruth Anderson Ultra 50mi	9:50:53 h	10
2017
15.07	50mi	16th Tahoe Rim Trail 50M Endurance Run	13:44:10 h	87
21.05	50km	30th Ohlone 50K Wilderness Run	8:12:51 h	65
07.04	100mi	6th The Zion 100 Mile Run	32:07:08 h	118
11.03	50km	6th Marin Ultra Challenge 50 km Race	6:17:24 h	87
04.02	50mi	4th Sean O'Brien 50 Mile Trail Race	11:03:14 h	49
2016
31.12	12h	7th New Years One Day 12 Hour Run	101.066 km	4
08.10	50mi	34th Dick Collins Firetrails 50 Mile	10:32:08 h	44
2015
07.02	50mi	2nd Sean O'Brien 50 Mile Trail Race	11:39:22 h	43
2014
01.11	100mi	12th Javelina Jundred 100 Mile Endurance Run	28:08:01 h	216
27.09	50km	13th Stevens Creek Striders 50K	6:06:44 h	12
13.09	50mi	8th Headlands Hundred 50 Mile Endurance Run	10:19:59 h	14
17.08	50km	19th Run On The Sly 50 km	5:46:18 h	25
19.07	100mi	13th Tahoe Rim Trail 100M Endurance Run	31:02:28 h	92
17.05	50mi	21st Bishop High Sierra Ultramarathons 50 Miles	11:44:45 h	15
12.04	50mi	6th Lake Sonoma 50 Mile Race	11:17:14 h	211
15.03	50mi	3rd Marin Ultra Challenge 50 Mile Race	11:58:25 h	62
2013
31.12	24h	4th New Years One Day 24 Hour Run	146.846 km	10
12.10	50mi	31st Dick Collins Firetrails 50 Mile	10:14:27 h	132
28.09	50km	12th Stevens Creek Striders 50K	6:40:32 h	22
2012
08.01	50km	32nd Epiphany Ultras - 50 km Run	6:43:00 h	10
2011
14.08	50km	10th Stevens Creek Striders 50K	6:19:43 h	14
2010
15.08	50km	9th Stevens Creek Striders 50K	7:00:37 h	30
2008
06.09	50km	3rd Redwood Park 50K Trail Run	6:33:19 h	15
01.03	50km	6th Skyline Ridge Trail Run	5:44:23 h	26
02.02	50km	7th Woodside Trail Run 50K	5:47:20 h	27
2007
29.04	37mi	5th Diablo Endurance Run	9:55:00 h	8
2005
17.09	50km	1st Psychedelic Climacteric 50k	6:37:00 h	4
20.03	50km	4th Stevens Creek Striders 50K	6:14:57 h	21
05.02	50km	4th Woodside Trail Run 50K	5:44:07 h	26
2004
08.05	50km	21st Quicksilver 50 km Endurance Run	5:46:15 h	28

Filter

Runner	Races in common

DUV-index calculation details

#	Date	Race	Credited km	DUV-index+
✓ 1	11/11/2023	10th Tunnel Hill 100 Mile Race	160,93	×3
✓ 2	15/7/2022	2nd The Yeti 100 Mile Endurance Run-Washington	160,93	×3
✓ 3	5/2/2021	3rd Grandmaster Ultras 100 Mile Run	160,93	×3
✓ 4	2/11/2019	19th Rio Del Lago 100 Mile Endurance Run	160,93	×3
✓ 5	27/10/2018	16th Javelina Jundred 100 Mile Endurance Run	160,93	×3
✓ 6	7/4/2017	6th The Zion 100 Mile Run	160,93	×3
✓ 7	1/11/2014	12th Javelina Jundred 100 Mile Endurance Run	160,93	×3
✓ 8	19/7/2014	13th Tahoe Rim Trail 100M Endurance Run	160,93	×3
✓ 9	31/12/2013	4th New Years One Day 24 Hour Run	146,85	×2
✓ 10	31/12/2016	7th New Years One Day 12 Hour Run	101,07	×1
✓ 11	18/8/2018	17th Waldo 100K Trail Run	100,00	×1
✓ 12	31/12/2019	10th New Years One Day 12 Hour Run	83,52	×1
✓ 13	11/7/2026	17th Dirty Dozen 12h Endurance Run	82,69	×1
✓ 14	31/12/2025	15th New Years One Day 12 Hour Run	81,35	×1
✓ 15	31/12/2022	12th New Years One Day 24 Hour Run	81,03	×1
✓ 16	4/4/2026	46th American River 50 Mile Endurance Run	80,47	×1
✓ 17	12/4/2025	32nd Leona Divide 50 Mile Run	80,47	×1
✓ 18	27/1/2024	1st Monterey Ultra	80,47	×1
✓ 19	10/6/2023	13th Cool Moon 50 Mile Endurance Run	80,47	×1
✓ 20	23/4/2022	29th Leona Divide 50 Mile Run	80,47	×1
✓ 21	24/7/2021	15th Burning River 50 Mile Endurance Run	80,47	×1
✓ 22	28/9/2019	6th Overlook Endurance Run 50M	80,47	×1
✓ 23	18/5/2019	34th Silver State 50 Mile	80,47	×1
✓ 24	9/3/2019	8th Marin Ultra Challenge 50 Mile Race	80,47	×1
✓ 25	19/5/2018	6th San Francisco 50 Mile Endurance Run	80,47	×1
✓ 26	22/4/2018	32th Ruth Anderson Ultra 50mi	80,47	×1
✓ 27	15/7/2017	16th Tahoe Rim Trail 50M Endurance Run	80,47	×1
✓ 28	4/2/2017	4th Sean O'Brien 50 Mile Trail Race	80,47	×1
✓ 29	8/10/2016	34th Dick Collins Firetrails 50 Mile	80,47	×1
✓ 30	7/2/2015	2nd Sean O'Brien 50 Mile Trail Race	80,47	×1
✓ 31	13/9/2014	8th Headlands Hundred 50 Mile Endurance Run	80,47	×1
✓ 32	17/5/2014	21st Bishop High Sierra Ultramarathons 50 Miles	80,47	×1
✓ 33	12/4/2014	6th Lake Sonoma 50 Mile Race	80,47	×1
✓ 34	15/3/2014	3rd Marin Ultra Challenge 50 Mile Race	80,47	×1
✓ 35	12/10/2013	31st Dick Collins Firetrails 50 Mile	80,47	×1
✓ 36	31/12/2021	11th New Years One Day 12 Hour Run	67,75	×1
✓ 37	14/4/2019	16th Connemara Int. Ultramarathon	63,50	×1
✓ 38	29/4/2007	5th Diablo Endurance Run	59,55	×1
✓ 39	31/12/2023	13th New Years One Day 6 Hour Run	51,47	—
✓ 40	14/3/2026	14th Marin Ultra Challenge 50 km Race	50,00	—
✓ 41	7/2/2026	14th Fort Ord 50K Trail Run	50,00	—
✓ 42	7/6/2025	40th Silver State 50 km	50,00	—
✓ 43	8/3/2025	13th Marin Ultra Challenge 50 km Race	50,00	—
✓ 44	15/2/2025	12th Chabot Trail Run	50,00	—
✓ 45	8/6/2024	15th Cinderella 50 km Spring Trail Run	50,00	—
✓ 46	9/3/2024	12th Marin Ultra Challenge 50 km Race	50,00	—
✓ 47	9/12/2023	15th Hunter S. Thompson Fear & Loathing 50 km	50,00	—
✓ 48	14/10/2023	37th Ruth Anderson Ultra 50km	50,00	—
✓ 49	6/8/2023	42nd Skyline 50k Endurance Run	50,00	—
✓ 50	4/3/2023	33rd Way Too Cool 50K Endurance Run	50,00	—
51	28/1/2023	11th Fort Ord 50K Trail Run	50,00	—
52	4/12/2022	14th Hunter S. Thompson Fear & Loathing 50 km	50,00	—
53	5/11/2022	22th Rio Del Lago 50 km Race	50,00	—
54	5/3/2022	32nd Way Too Cool 50K Endurance Run	50,00	—
55	5/12/2021	13th Hunter S. Thompson Fear & Loathing 50 km	50,00	—
56	9/10/2021	35th Ruth Anderson Ultra 50km	50,00	—
57	8/2/2020	10th Golden Gate 50 km Winter Trail Run	50,00	—
58	4/8/2019	38th Skyline 50k Endurance Run	50,00	—
59	2/2/2019	7th Fort Ord 50K Trail Run	50,00	—
60	21/5/2017	30th Ohlone 50K Wilderness Run	50,00	—
61	11/3/2017	6th Marin Ultra Challenge 50 km Race	50,00	—
62	27/9/2014	13th Stevens Creek Striders 50K	50,00	—
63	17/8/2014	19th Run On The Sly 50 km	50,00	—
64	28/9/2013	12th Stevens Creek Striders 50K	50,00	—
65	8/1/2012	32nd Epiphany Ultras - 50 km Run	50,00	—
66	14/8/2011	10th Stevens Creek Striders 50K	50,00	—
67	15/8/2010	9th Stevens Creek Striders 50K	50,00	—
68	6/9/2008	3rd Redwood Park 50K Trail Run	50,00	—
69	1/3/2008	6th Skyline Ridge Trail Run	50,00	—
70	2/2/2008	7th Woodside Trail Run 50K	50,00	—
71	17/9/2005	1st Psychedelic Climacteric 50k	50,00	—
72	20/3/2005	4th Stevens Creek Striders 50K	50,00	—
73	5/2/2005	4th Woodside Trail Run 50K	50,00	—
74	8/5/2004	21st Quicksilver 50 km Endurance Run	50,00	—