Donn Ozaki

Born : 1958 Cat. M65 Ultrarunner since 2005

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

81,0%

Rank quotient ?This runner's calculation uses 101 eligible race(s): Σ(rank − 1) = 9 350; Σ finishers = 11 546. 9 350 / 11 546 × 100 = 80.98%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed101

Km — ultra races7 382 km

> 100 km12

> 160 km7

> 24h6

> 48h2

Longest race163,6 km

35th Across the Years, 48h — 28/12/2019

Km per year (ultra races)

150

2022

155

2023

100

2024

2025

206

2026

Race types (share of distance)

Road21,6%

Trail78,4%

Wins & podiums (ultra)

🏆 Win0

🏆 Win M0

🏅 Top 30

🏅 Top 3 M2

Longest winning streak0

Current streak0

Records

50 km5h01'27 100 km12h42'08 50 mi10h45'40 100 mi26h34'33 12 h72,10 km 24 h135,50 km 48 h163,56 km

HISTORY

101 race(s)

Date		Race	Perf.	Rk
2026
26.06	100km	6th The Yeti 100 km Endurance Run-Washington	22:18:42 h	44
17.04	12h	11th RUN4Kids 12 Hour Race	55.876 km	6
28.02	50km	8th Grandmaster Ultras 50 km Run	11:08:00 h	26
2025
07.06	50km	4th Malibu Canyon Trail Races (SAMO 50 km)	10:56:37 h	97
2024
19.10	50km	3rd SAMO Trail Runs	11:37:55 h	70
11.05	50km	41th Quicksilver 50 km Endurance Run	11:11:30 h	144
2023
15.07	55km	22th Tahoe Rim Trail 55km Endurance Run	18:23:56 h	104
03.06	50km	11th Marin Ultra Challenge 50 km Race	9:39:04 h	172
23.04	50km	30th Leona Divide 50 km Run	14:13:38 h	128
2022
05.11	24h	6th Boundiful 24 Hours Endurance Run	99.779 km	15
22.10	50km	1st SAMO Trail Runs	9:29:11 h	87
2021
13.11	12h	5th Boundiful 12 Hours Endurance Run	48.280 km	21
09.10	50km	35th Ruth Anderson Ultra 50km	8:06:10 h	41
2020
29.02	50km	11th Orange Curtain 50km Ultra Race	7:25:36 h	31
2019
28.12	48h	35th Across the Years, 48h	163.563 km	29
29.06	24h	2nd Cirque to Griffith Park 24 Hour Run	105.589 km	29
16.02	50km	10th Orange Curtain 50km Ultra Race	7:15:50 h	26
2018
03.11	12h	3rd Boundiful 12 Hours Endurance Run	56.327 km	10
03.02	50km	5th Sean O'Brien 50 km Trail Race	10:56:19 h	171
2017
11.11	50km	7th Chino Hills 50K Race	8:23:27 h	78
04.11	12h	2nd Boundiful 12 Hours Endurance Run	51.499 km	15
25.02	50km	8th Orange Curtain 50km Ultra Race	7:17:48 h	27
2016
31.12	48h	32nd Across the Years, 48h	128.401 km	44
05.11	12h	1st Boundiful 12 Hours Endurance Run	49.889 km	16
20.08	12h	2nd Julian Station Full Moon 12 Hour Run	64.856 km	14
04.03	24h	1st San Diego Pirate's Cove 24 Hour Run	100.423 km	11
30.01	50km	6th Bandit Ultra 50K Trail Run	8:01:43 h	70
2015
11.07	50km	10th Angeles National Forest 50k Trail Race	9:00:36 h	79
25.04	50km	23rd Leona Divide 50 km Run	10:01:54 h	238
21.03	50mi	9th Old Goat's 50 Mile Trail Race	14:48:10 h	60
28.02	50km	6th Orange Curtain 50km Ultra Race - morning run	6:08:16 h	12
2014
23.08	50km	23rd Bulldog 50k Ultra Run	6:59:53 h	129
17.05	50km	4th Born to Run Ultra 50 km Marathon	13:35:04 h	266
26.04	50mi	22nd Leona Divide 50 Mile Run	13:03:59 h	180
15.03	68mi	2nd Coyote Cohorts Backbone Trail Ultra	25:47:00 h	53
01.02	50km	1st Sean O'Brien 50 km Trail Race	8:10:28 h	106
18.01	50mi	2nd San Diego 50 Mile Trail	12:10:56 h	121
2013
23.11	50mi	2nd Run D'Amore 50M Endurance Run	14:22:38 h	8
21.09	50km	7th Noble Canyon 50k	8:31:25 h	171
17.08	50km	3rd Run-de-Vous 50 km Endurance Run	13:50:34 h	27
23.03	50mi	7th Old Goat's 50 Mile Trail Race	15:31:13 h	117
17.02	50km	3rd Bandit Ultra 50K Trail Run	8:30:10 h	130
02.02	50km	2nd Ray Miller 50 km Trail Race	8:19:00 h	136
2012
02.12	50km	26th OTHTC High Desert 50K Ultra	7:08:55 h	171
26.05	100mi	4th Nanny Goat 100 Mile Race	26:34:33 h	21
28.04	50mi	20th Leona Divide 50 Mile Run	12:30:33 h	202
22.01	50km	8th Calico Trail Run 50 km	7:22:48 h	92
2011
04.12	50km	25th OTHTC High Desert 50K Ultra	6:35:54 h	133
26.11	50mi	3rd Santa Barbara Red Rock 50 Mile	17:16:00 h	63
12.11	50mi	1st Last Chance 50 Mile	10:49:29 h	88
22.10	100mi	2nd 100-Mile Club Challenge for Kids	29:09:00 h	20
14.05	50mi	8th PCT 50 Mile Trail Run	13:19:00 h	94
30.04	50mi	19th Leona Divide 50 Mile Run	12:00:36 h	196
05.03	50km	28th San Juan Trail 50 km	8:41:02 h	63
16.01	50km	7th Calico Trail Run 50 km	7:07:47 h	67
2010
05.12	50km	24th OTHTC High Desert 50K Ultra	6:08:53 h	144
27.11	40mi	2nd Santa Barbara Red Rock 40 Mile	12:22:00 h	67
06.11	100mi	3rd Mother Road 100 Mile	28:53:17 h	107
23.10	100km	8th Javelina Jundred 100 km Endurance Run	16:33:28 h	62
18.09	100km	2nd The Chimera 100 km Mountain Race	26:53:00 h	14
07.08	50km	6th Angeles National Forest 50k Trail Race	7:47:17 h	54
05.06	50km	2nd Blue Canyon 50 km Trail Race	10:40:00 h	31
29.05	12h	2nd Nanny Goat 12 Hour Race	65.983 km	29
15.05	50mi	17th Bishop High Sierra Ultramarathons 50 Miles	15:13:15 h	64
01.05	100km	15th Miwok 100k Trail race	16:03:32 h	259
17.04	50mi	18th Leona Divide 50 Mile Run	12:48:14 h	146
16.01	50mi	30th Avalon Benefit 50-Mile Run	12:38:20 h	131
2009
19.12	50km	5th Rodeo Beach 50km	7:23:52 h	95
06.12	50km	23rd OTHTC High Desert 50K Ultra	6:18:34 h	141
28.11	40mi	1st Santa Barbara Red Rock 40 Mile	11:58:00 h	42
21.11	50mi	6th PCT 50 Mile Trail Run	14:26:00 h	74
31.10	100mi	7th Javelina Jundred 100 Mile Endurance Run	29:52:00 h	124
08.08	50mi	5th Angeles National Forest 50Mile Trail Race	13:43:51 h	67
06.06	100mi	8th San Diego 100 Mile Endurance Run	30:18:08 h	79
28.03	50mi	3rd Old Goat's 50 Mile Trail Race	14:33:01 h	82
13.03	100km	2nd Coyote Two Moon Ultras 100 km	23:41:00 h	36
21.02	50km	4th Orange Curtain 50km Ultra Race	5:01:27 h	15
18.01	50km	5th Calico Trail Run 50 km	6:36:48 h	61
2008
31.12	24h	26th Across the Years, 24h	135.500 km	15
29.11	33mi	Rose Valley 33 Mile Endurance Run	8:44:00 h	77
23.11	50km	4th Santa Monica Mountains 50 km	7:56:08 h	54
25.10	12h	3rd San Francisco One Day, 12h	72.098 km	36
11.10	50mi	26th Dick Collins Firetrails 50 Mile	12:16:47 h	141
20.09	50km	1st Skyline to the Sea 50km	6:40:12 h	113
23.08	50km	17th Bulldog 50k Ultra Run	7:56:23 h	119
19.07	100mi	20th Vermont 100 Mile Endurance Race	29:49:06 h	155
08.06	33mi	12th Holcomb Valley 33 Mile	8:47:54 h	92
03.05	100km	13th Miwok 100k Trail race	15:51:45 h	269
19.04	50mi	16th Leona Divide 50 Mile Run	12:41:24 h	143
05.04	50mi	29th American River 50 Mile Endurance Run	10:45:40 h	308
16.02	100km	3rd Orange Curtain 100km Ultra Race	12:42:08 h	10
12.01	50mi	28th Avalon Benefit 50-Mile Run	11:29:01 h	115
2007
02.12	50km	21st OTHTC High Desert 50K Ultra	6:02:21 h	114
24.11	35mi	15th Santa Barbara Nine Trails 35 Mile Endurance Run	12:08:00 h	78
22.09	53.2mi	21st Sierra Nevada Endurance 53 Mile Run	13:10:03 h	31
25.08	50km	16th Bulldog 50k Ultra Run	6:46:08 h	117
14.04	50mi	28th American River 50 Mile Endurance Run	11:31:44 h	382
13.01	50mi	27th Avalon Benefit 50-Mile Run	11:28:47 h	112
2006
25.11	35mi	14th Santa Barbara Nine Trails 35 Mile Endurance Run	11:35:00 h	73
11.03	50km	17th Way Too Cool 50K Endurance Run	7:44:38 h	358
2005
26.02	50km	2nd Lake Hodges Trail Fest 50K	6:51:27 h	46

Filter

Runner	Races in common

DUV-index calculation details

#	Date	Race	Credited km	DUV-index+
✓ 1	28/12/2019	35th Across the Years, 48h	163,56	×2
✓ 2	26/5/2012	4th Nanny Goat 100 Mile Race	160,93	×2
✓ 3	22/10/2011	2nd 100-Mile Club Challenge for Kids	160,93	×2
✓ 4	6/11/2010	3rd Mother Road 100 Mile	160,93	×2
✓ 5	31/10/2009	7th Javelina Jundred 100 Mile Endurance Run	160,93	×2
✓ 6	6/6/2009	8th San Diego 100 Mile Endurance Run	160,93	×2
✓ 7	19/7/2008	20th Vermont 100 Mile Endurance Race	160,93	×2
✓ 8	31/12/2008	26th Across the Years, 24h	135,50	×2
✓ 9	31/12/2016	32nd Across the Years, 48h	128,40	×2
✓ 10	15/3/2014	2nd Coyote Cohorts Backbone Trail Ultra	109,44	×1
✓ 11	29/6/2019	2nd Cirque to Griffith Park 24 Hour Run	105,59	×1
✓ 12	4/3/2016	1st San Diego Pirate's Cove 24 Hour Run	100,42	×1
✓ 13	26/6/2026	6th The Yeti 100 km Endurance Run-Washington	100,00	×1
✓ 14	23/10/2010	8th Javelina Jundred 100 km Endurance Run	100,00	×1
✓ 15	18/9/2010	2nd The Chimera 100 km Mountain Race	100,00	×1
✓ 16	1/5/2010	15th Miwok 100k Trail race	100,00	×1
✓ 17	13/3/2009	2nd Coyote Two Moon Ultras 100 km	100,00	×1
✓ 18	3/5/2008	13th Miwok 100k Trail race	100,00	×1
✓ 19	16/2/2008	3rd Orange Curtain 100km Ultra Race	100,00	×1
✓ 20	5/11/2022	6th Boundiful 24 Hours Endurance Run	99,78	×1
✓ 21	22/9/2007	21st Sierra Nevada Endurance 53 Mile Run	85,62	×1
✓ 22	21/3/2015	9th Old Goat's 50 Mile Trail Race	80,47	×1
✓ 23	26/4/2014	22nd Leona Divide 50 Mile Run	80,47	×1
✓ 24	18/1/2014	2nd San Diego 50 Mile Trail	80,47	×1
✓ 25	23/11/2013	2nd Run D'Amore 50M Endurance Run	80,47	×1
✓ 26	23/3/2013	7th Old Goat's 50 Mile Trail Race	80,47	×1
✓ 27	28/4/2012	20th Leona Divide 50 Mile Run	80,47	×1
✓ 28	26/11/2011	3rd Santa Barbara Red Rock 50 Mile	80,47	×1
✓ 29	12/11/2011	1st Last Chance 50 Mile	80,47	×1
✓ 30	14/5/2011	8th PCT 50 Mile Trail Run	80,47	×1
✓ 31	30/4/2011	19th Leona Divide 50 Mile Run	80,47	×1
✓ 32	15/5/2010	17th Bishop High Sierra Ultramarathons 50 Miles	80,47	×1
✓ 33	17/4/2010	18th Leona Divide 50 Mile Run	80,47	×1
✓ 34	16/1/2010	30th Avalon Benefit 50-Mile Run	80,47	×1
✓ 35	21/11/2009	6th PCT 50 Mile Trail Run	80,47	×1
✓ 36	8/8/2009	5th Angeles National Forest 50Mile Trail Race	80,47	×1
✓ 37	28/3/2009	3rd Old Goat's 50 Mile Trail Race	80,47	×1
✓ 38	11/10/2008	26th Dick Collins Firetrails 50 Mile	80,47	×1
✓ 39	19/4/2008	16th Leona Divide 50 Mile Run	80,47	×1
✓ 40	5/4/2008	29th American River 50 Mile Endurance Run	80,47	×1
✓ 41	12/1/2008	28th Avalon Benefit 50-Mile Run	80,47	×1
✓ 42	14/4/2007	28th American River 50 Mile Endurance Run	80,47	×1
✓ 43	13/1/2007	27th Avalon Benefit 50-Mile Run	80,47	×1
✓ 44	25/10/2008	3rd San Francisco One Day, 12h	72,10	×1
✓ 45	29/5/2010	2nd Nanny Goat 12 Hour Race	65,98	×1
✓ 46	20/8/2016	2nd Julian Station Full Moon 12 Hour Run	64,86	×1
✓ 47	27/11/2010	2nd Santa Barbara Red Rock 40 Mile	64,37	×1
✓ 48	28/11/2009	1st Santa Barbara Red Rock 40 Mile	64,37	×1
✓ 49	24/11/2007	15th Santa Barbara Nine Trails 35 Mile Endurance Run	56,33	—
✓ 50	25/11/2006	14th Santa Barbara Nine Trails 35 Mile Endurance Run	56,33	—
✓ 51	3/11/2018	3rd Boundiful 12 Hours Endurance Run	56,33	—
✓ 52	17/4/2026	11th RUN4Kids 12 Hour Race	55,88	—
✓ 53	15/7/2023	22th Tahoe Rim Trail 55km Endurance Run	55,00	—
54	29/11/2008	Rose Valley 33 Mile Endurance Run	53,11	—
55	8/6/2008	12th Holcomb Valley 33 Mile	53,11	—
56	4/11/2017	2nd Boundiful 12 Hours Endurance Run	51,50	—
57	28/2/2026	8th Grandmaster Ultras 50 km Run	50,00	—
58	7/6/2025	4th Malibu Canyon Trail Races (SAMO 50 km)	50,00	—
59	19/10/2024	3rd SAMO Trail Runs	50,00	—
60	11/5/2024	41th Quicksilver 50 km Endurance Run	50,00	—
61	3/6/2023	11th Marin Ultra Challenge 50 km Race	50,00	—
62	23/4/2023	30th Leona Divide 50 km Run	50,00	—
63	22/10/2022	1st SAMO Trail Runs	50,00	—
64	9/10/2021	35th Ruth Anderson Ultra 50km	50,00	—
65	29/2/2020	11th Orange Curtain 50km Ultra Race	50,00	—
66	16/2/2019	10th Orange Curtain 50km Ultra Race	50,00	—
67	3/2/2018	5th Sean O'Brien 50 km Trail Race	50,00	—
68	11/11/2017	7th Chino Hills 50K Race	50,00	—
69	25/2/2017	8th Orange Curtain 50km Ultra Race	50,00	—
70	30/1/2016	6th Bandit Ultra 50K Trail Run	50,00	—
71	11/7/2015	10th Angeles National Forest 50k Trail Race	50,00	—
72	25/4/2015	23rd Leona Divide 50 km Run	50,00	—
73	28/2/2015	6th Orange Curtain 50km Ultra Race - morning run	50,00	—
74	23/8/2014	23rd Bulldog 50k Ultra Run	50,00	—
75	17/5/2014	4th Born to Run Ultra 50 km Marathon	50,00	—
76	1/2/2014	1st Sean O'Brien 50 km Trail Race	50,00	—
77	21/9/2013	7th Noble Canyon 50k	50,00	—
78	17/8/2013	3rd Run-de-Vous 50 km Endurance Run	50,00	—
79	17/2/2013	3rd Bandit Ultra 50K Trail Run	50,00	—
80	2/2/2013	2nd Ray Miller 50 km Trail Race	50,00	—
81	2/12/2012	26th OTHTC High Desert 50K Ultra	50,00	—
82	22/1/2012	8th Calico Trail Run 50 km	50,00	—
83	4/12/2011	25th OTHTC High Desert 50K Ultra	50,00	—
84	5/3/2011	28th San Juan Trail 50 km	50,00	—
85	16/1/2011	7th Calico Trail Run 50 km	50,00	—
86	5/12/2010	24th OTHTC High Desert 50K Ultra	50,00	—
87	7/8/2010	6th Angeles National Forest 50k Trail Race	50,00	—
88	5/6/2010	2nd Blue Canyon 50 km Trail Race	50,00	—
89	19/12/2009	5th Rodeo Beach 50km	50,00	—
90	6/12/2009	23rd OTHTC High Desert 50K Ultra	50,00	—
91	21/2/2009	4th Orange Curtain 50km Ultra Race	50,00	—
92	18/1/2009	5th Calico Trail Run 50 km	50,00	—
93	23/11/2008	4th Santa Monica Mountains 50 km	50,00	—
94	20/9/2008	1st Skyline to the Sea 50km	50,00	—
95	23/8/2008	17th Bulldog 50k Ultra Run	50,00	—
96	2/12/2007	21st OTHTC High Desert 50K Ultra	50,00	—
97	25/8/2007	16th Bulldog 50k Ultra Run	50,00	—
98	11/3/2006	17th Way Too Cool 50K Endurance Run	50,00	—
99	26/2/2005	2nd Lake Hodges Trail Fest 50K	50,00	—
100	5/11/2016	1st Boundiful 12 Hours Endurance Run	49,89	—
101	13/11/2021	5th Boundiful 12 Hours Endurance Run	48,28	—