Robert Byrne

Born : 1957 Cat. M65 Ultrarunner since 1992

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 ?

Canada

China

Egypt

Germany

Greece

Morocco

Netherlands

United States

Vietnam

19,5%

Rank quotient ?This runner's calculation uses 128 eligible race(s): Σ(rank − 1) = 4 707; Σ finishers = 24 179. 4 707 / 24 179 × 100 = 19.47%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed148

Km — ultra races12 174 km

> 100 km29

> 160 km28

> 200 km6

> 24h2

Longest race250,0 km

Racing the Planet - Vietnam 2008 — 18/2/2008

Km per year (ultra races)

2022

2023

2024

2025

2026

Race types (share of distance)

Road7,7%

Trail84,2%

Stage8,2%

Wins & podiums (ultra)

🏆 Win4

🏆 Win M4

🏅 Top 311

🏅 Top 3 M11

Longest winning streak1

Current streak0

Records

50 km3h45'11 100 km9h13'23 50 mi6h39'34 100 mi17h42'45 12 h85,38 km 24 h191,51 km

HISTORY

129 race(s)

Date		Race	Perf.	Rk
2011
31.12	12h	2nd New Years One Day 12 Hour Run	85.375 km	15
2010
20.03	50km	2nd Diablo Trails Challenge	6:20:25 h	25
2008
13.09	50km	33. RUN Winschoten 100 km - 50km Split	4:42:25 h	35
13.09	100km	33. RUN Winschoten 100 km	10:09:05 h	33
03.08	50km	27th Skyline 50k Endurance Run	5:22:26 h	36
21.06	50km	5th Pacifica 50 km Trail Run - Summer Edition	6:42:31 h	10
03.05	100km	13th Miwok 100k Trail race	11:38:08 h	69
12.04	50mi	1st Lake Sonoma 50 Mile Race	10:18:12 h	17
18.02	250km/6stages	Racing the Planet - Vietnam 2008	32:28:23 h	3 🥉
2007
24.11	28mi	23rd Quad Dipsea Trail Run	6:05:55 h	96
20.10	24h	2nd San Francisco One Day, 24h	163.670 km	11
05.08	50km	26th Skyline 50k Endurance Run	5:12:06 h	37
23.06	100mi	34th Western States 100 Mile Endurance Run	23:29:28 h	76
12.05	50mi	24th Quicksilver 50 Mile Endurance Run	8:59:26 h	21
05.05	100km	12th Miwok 100k Trail race	11:30:39 h	55
14.04	50mi	28th American River 50 Mile Endurance Run	8:33:30 h	91
24.03	50km	6th Pirates Cove Trail Run	4:55:31 h	15
13.01	50mi	27th Avalon Benefit 50-Mile Run	8:00:43 h	11
2006
25.11	28mi	22nd Quad Dipsea Trail Run	6:19:42 h	116
28.10	24h	1st San Francisco One Day, 24h	191.511 km	2 🥈
23.09	53.2mi	20th Sierra Nevada Endurance 53 Mile Run	10:03:21 h	7
06.08	50km	25th Skyline 50k Endurance Run	4:47:09 h	16
24.06	100mi	33th Western States 100 Mile Endurance Run	29:04:42 h	159
06.05	100km	11th Miwok 100k Trail race	11:42:40 h	71
01.04	50mi	27th American River 50 Mile Endurance Run	8:41:45 h	70
25.03	50km	5th Pirates Cove Trail Run	5:51:07 h	9
14.01	50mi	26th Avalon Benefit 50-Mile Run	8:06:55 h	9
2005
26.11	28mi	21st Quad Dipsea Trail Run	5:55:37 h	80
25.09	250km/6stages	Sahara Race Egypt	33:32:28 h	8
07.08	50km	24th Skyline 50k Endurance Run	5:11:24 h	20
25.06	100mi	32th Western States 100 Mile Endurance Run	22:35:16 h	63
30.04	100km	10th Miwok 100k Trail race	10:52:39 h	46
02.04	50mi	26th American River 50 Mile Endurance Run	7:58:34 h	45
19.03	50km	3rd Rucky Chucky Roundabout 50K	5:31:46 h	10
05.02	100km	27th 100km Jed Smith Ultra Classic	9:13:23 h	1 🏆
2004
27.11	28mi	20th Quad Dipsea Trail Run	5:49:15 h	64
13.11	50km	2nd Stinson Beach 50 km	5:09:22 h	4
26.06	100mi	31th Western States 100 Mile Endurance Run	23:14:13 h	59
01.05	100km	9th Miwok 100k Trail race	11:38:27 h	45
03.04	50mi	25th American River 50 Mile Endurance Run	8:07:37 h	35
20.03	50km	2nd Rucky Chucky Roundabout 50K	5:45:30 h	13
13.03	50km	15th Way Too Cool 50K Endurance Run	4:57:56 h	92
10.01	50mi	24th Avalon Benefit 50-Mile Run	7:46:12 h	2 🥈
2003
20.12	50km	Muir Beach Trail Run	6:36:50 h	15
07.09	250km/6stages	Gobi March China	34:16:10 h	4
23.08	31.5mi	6th Tamalpa Headlands 50K	5:47:18 h	83
03.08	50km	22nd Skyline 50k Endurance Run	4:59:45 h	29
07.06	100mi	8th Kettle Moraine 100 Mile Endurance Run	21:55:12 h	8
03.05	100km	8th Miwok 100k Trail race	11:59:08 h	51
05.04	50mi	24th American River 50 Mile Endurance Run	7:51:44 h	49
08.03	50km	14th Way Too Cool 50K Endurance Run	4:46:48 h	78
11.01	52mi	Epiphany Ultras - The Real Deal	8:47:00 h	1 🏆
2002
30.11	28mi	18th Quad Dipsea Trail Run	5:38:03 h	66
03.08	125km	3rd Canadian Death Race	16:50:52 h	4
29.06	100mi	29th Western States 100 Mile Endurance Run	22:14:50 h	41
04.05	100km	7th Miwok 100k Trail race	11:00:14 h	32
06.04	50mi	23rd American River 50 Mile Endurance Run	7:48:23 h	38
09.03	50km	13th Way Too Cool 50K Endurance Run	4:56:05 h	91
09.02	50mi	24th Jed Smith Ultra Classic - 50 Mile Race	6:50:50 h	2 🥈
12.01	50mi	22nd Avalon Benefit 50-Mile Run	7:40:15 h	11
2001
29.09	100mi	16th Angeles Crest 100 Mile	26:54:06 h	21
05.08	50km	20th Skyline 50k Endurance Run	4:49:45 h	29
23.06	100mi	28th Western States 100 Mile Endurance Run	23:36:15 h	77
12.05	50mi	18th Quicksilver 50 Mile Endurance Run	8:41:12 h	10
05.05	100km	6th Miwok 100k Trail race	11:46:23 h	42
01.04	243km/6stages	16. Marathon des Sables	31:53:33 h	65
10.03	50km	12th Way Too Cool 50K Endurance Run	4:58:37 h	82
03.02	100mi	9th Rocky Raccoon 100 Mile Trail Run	18:36:28 h	9
2000
11.11	50mi	5th Helen Klein Ultra Classic 50mi	6:46:20 h	4
29.09	245.3km	18. Spartathlon	32:09:34 h	22
05.08	50km	19th Skyline 50k Endurance Run	4:42:50 h	16
24.06	100mi	27th Western States 100 Mile Endurance Run	23:29:58 h	46
06.05	100km	5th Miwok 100k Trail race	11:30:12 h	37
08.04	100mi	6th Umstead Endurance Run 100 Miles	17:42:45 h	3 🥉
11.03	50km	11th Way Too Cool 50K Endurance Run	4:53:27 h	59
26.02	100km	4th Catalina 100K Trail Run	10:17:08 h	10
11.01	49mi	Epiphany Ultras - The Real Deal	8:26:00 h	4
1999
13.11	50mi	4th Helen Klein Ultra Classic 50mi	7:33:25 h	23
17.07	100mi	11th Vermont 100 Mile Endurance Race	20:32:39 h	9
26.06	100mi	26th Western States 100 Mile Endurance Run	22:42:31 h	37
15.05	50km	14th Silver State 50 km	6:31:40 h	10
08.05	50km	16th Quicksilver 50 km Endurance Run	4:38:12 h	9
01.05	100km	4th Miwok 100k Trail race	10:48:00 h	18
10.04	50mi	20th American River 50 Mile Endurance Run	7:23:49 h	28
13.03	50km	10th Way Too Cool 50K Endurance Run	5:01:25 h	86
27.02	100km	3rd Catalina 100K Trail Run	10:28:17 h	8
13.02	50km	21st Jed Smith Ultra Classic - 50 km Race	3:45:11 h	13
09.01	48km	Epiphany Ultras - The Popular But Wussy Metric	5:56:00 h	21
1998
28.11	28mi	14th Quad Dipsea Trail Run	5:37:03 h	46
14.11	50mi	3rd Helen Klein Ultra Classic 50mi	6:39:34 h	10
24.10	52.4mi	12th Sierra Nevada Endurance 52 Mile Run	8:46:15 h	7
10.10	50mi	16th Dick Collins Firetrails 50 Mile	8:28:11 h	13
12.09	100mi	19th Wasatch Front 100 Mile	28:09:00 h	42
22.08	100mi	16th Leadville Trail 100 Mile	23:24:20 h	24
01.08	50km	17th Skyline 50k Endurance Run	5:09:34 h	38
27.06	100mi	25th Western States 100 Mile Endurance Run	23:28:40 h	46
06.06	100mi	20th Old Dominion 100 Mile Endurance Run	18:28:39 h	5
16.05	76km	26. GutsMuths-Rennsteiglauf	6:44:53 h	89
04.04	50mi	19th American River 50 Mile Endurance Run	7:38:29 h	54
14.03	50km	9th Way Too Cool 50K Endurance Run	4:43:03 h	43
21.02	100km	2nd Catalina 100K Trail Run	10:11:24 h	3 🥉
1997
06.12	50mi	2nd Hunter S. Thompson Fear & Loathing 50 Miles	7:13:46 h	1 🏆
25.10	52.4mi	11th Sierra Nevada Endurance 52 Mile Run	8:57:18 h	17
26.09	245.3km	15. Spartathlon	31:56:00 h	23
02.08	50km	16th Skyline 50k Endurance Run	4:50:16 h	31
28.06	100mi	24th Western States 100 Mile Endurance Run	20:50:38 h	22
17.05	50mi	12th Silver State 50 Miles	9:34:56 h	16
03.05	100km	2nd Miwok 100k Trail race	11:23:02 h	16
26.04	50mi	California 50 Mile Endurance Run	7:11:29 h	6
05.04	50mi	18th American River 50 Mile Endurance Run	7:29:37 h	47
15.03	50km	8th Way Too Cool 50K Endurance Run	4:56:29 h	81
06.01	46mi	Epiphany Ultras - The Real Deal	8:18:00 h	3 🥉
1996
14.12	50mi	1st Hunter S. Thompson Fear & Loathing 50 Miles	7:59:06 h	1 🏆
12.10	50mi	14th Dick Collins Firetrails 50 Mile	8:43:23 h	22
22.09	50km	Down and Up Ruck-a-Chuck	5:36:00 h	9
24.08	50km	2nd Point Reyes 50K	5:27:11 h	41
29.06	100mi	23rd Western States 100 Mile Endurance Run	23:25:04 h	55
24.05	50km	9th Ohlone 50K Wilderness Run	5:25:17 h	15
05.05	100km	1st Miwok 100k Trail race	11:16:41 h	9
06.04	50mi	17th American River 50 Mile Endurance Run	9:03:13 h	156
1995
24.06	100mi	22nd Western States 100 Mile Endurance Run	28:52:46 h	126
01.04	50mi	16th American River 50 Mile Endurance Run	8:52:32 h	158
1994
07.08	50km	13th Skyline 50k Endurance Run	4:57:33 h	31
15.05	50km	7th Ohlone 50K Wilderness Run	5:59:27 h	15
02.04	50mi	15th American River 50 Mile Endurance Run	8:51:40 h	183
1993
08.05	50mi	10th Quicksilver 50 Mile Endurance Run	10:03:48 h	43
03.04	50mi	14th American River 50 Mile Endurance Run	8:43:06 h	146
1992
28.11	28mi	8th Quad Dipsea Trail Run	5:46:13 h	48
09.05	50mi	9th Quicksilver 50 Mile Endurance Run	9:52:05 h	26

Filter

Runner	Races in common

DUV-index calculation details

#	Date	Race	Credited km	DUV-index+
✓ 1	18/2/2008	Racing the Planet - Vietnam 2008	250,00	×3
✓ 2	25/9/2005	Sahara Race Egypt	250,00	×3
✓ 3	7/9/2003	Gobi March China	250,00	×3
✓ 4	29/9/2000	18. Spartathlon	245,30	×3
✓ 5	26/9/1997	15. Spartathlon	245,30	×3
✓ 6	1/4/2001	16. Marathon des Sables	243,00	×3
✓ 7	28/10/2006	1st San Francisco One Day, 24h	191,51	×2
✓ 8	20/10/2007	2nd San Francisco One Day, 24h	163,67	×2
✓ 9	23/6/2007	34th Western States 100 Mile Endurance Run	160,93	×2
✓ 10	24/6/2006	33th Western States 100 Mile Endurance Run	160,93	×2
✓ 11	25/6/2005	32th Western States 100 Mile Endurance Run	160,93	×2
✓ 12	26/6/2004	31th Western States 100 Mile Endurance Run	160,93	×2
✓ 13	7/6/2003	8th Kettle Moraine 100 Mile Endurance Run	160,93	×2
✓ 14	29/6/2002	29th Western States 100 Mile Endurance Run	160,93	×2
✓ 15	29/9/2001	16th Angeles Crest 100 Mile	160,93	×2
✓ 16	23/6/2001	28th Western States 100 Mile Endurance Run	160,93	×2
✓ 17	3/2/2001	9th Rocky Raccoon 100 Mile Trail Run	160,93	×2
✓ 18	24/6/2000	27th Western States 100 Mile Endurance Run	160,93	×2
✓ 19	8/4/2000	6th Umstead Endurance Run 100 Miles	160,93	×2
✓ 20	17/7/1999	11th Vermont 100 Mile Endurance Race	160,93	×2
✓ 21	26/6/1999	26th Western States 100 Mile Endurance Run	160,93	×2
✓ 22	12/9/1998	19th Wasatch Front 100 Mile	160,93	×2
✓ 23	22/8/1998	16th Leadville Trail 100 Mile	160,93	×2
✓ 24	27/6/1998	25th Western States 100 Mile Endurance Run	160,93	×2
✓ 25	6/6/1998	20th Old Dominion 100 Mile Endurance Run	160,93	×2
✓ 26	28/6/1997	24th Western States 100 Mile Endurance Run	160,93	×2
✓ 27	29/6/1996	23rd Western States 100 Mile Endurance Run	160,93	×2
✓ 28	24/6/1995	22nd Western States 100 Mile Endurance Run	160,93	×2
✓ 29	3/8/2002	3rd Canadian Death Race	125,00	×1
✓ 30	13/9/2008	33. RUN Winschoten 100 km	100,00	×1
✓ 31	3/5/2008	13th Miwok 100k Trail race	100,00	×1
✓ 32	5/5/2007	12th Miwok 100k Trail race	100,00	×1
✓ 33	6/5/2006	11th Miwok 100k Trail race	100,00	×1
✓ 34	30/4/2005	10th Miwok 100k Trail race	100,00	×1
✓ 35	5/2/2005	27th 100km Jed Smith Ultra Classic	100,00	×1
✓ 36	1/5/2004	9th Miwok 100k Trail race	100,00	×1
✓ 37	3/5/2003	8th Miwok 100k Trail race	100,00	×1
✓ 38	4/5/2002	7th Miwok 100k Trail race	100,00	×1
✓ 39	5/5/2001	6th Miwok 100k Trail race	100,00	×1
✓ 40	6/5/2000	5th Miwok 100k Trail race	100,00	×1
✓ 41	26/2/2000	4th Catalina 100K Trail Run	100,00	×1
✓ 42	1/5/1999	4th Miwok 100k Trail race	100,00	×1
✓ 43	27/2/1999	3rd Catalina 100K Trail Run	100,00	×1
✓ 44	21/2/1998	2nd Catalina 100K Trail Run	100,00	×1
✓ 45	3/5/1997	2nd Miwok 100k Trail race	100,00	×1
✓ 46	5/5/1996	1st Miwok 100k Trail race	100,00	×1
✓ 47	23/9/2006	20th Sierra Nevada Endurance 53 Mile Run	85,62	×1
✓ 48	31/12/2011	2nd New Years One Day 12 Hour Run	85,38	×1
✓ 49	24/10/1998	12th Sierra Nevada Endurance 52 Mile Run	84,33	×1
✓ 50	25/10/1997	11th Sierra Nevada Endurance 52 Mile Run	84,33	×1
✓ 51	11/1/2003	Epiphany Ultras - The Real Deal	83,69	×1
✓ 52	12/4/2008	1st Lake Sonoma 50 Mile Race	80,47	×1
✓ 53	12/5/2007	24th Quicksilver 50 Mile Endurance Run	80,47	×1
✓ 54	14/4/2007	28th American River 50 Mile Endurance Run	80,47	×1
✓ 55	13/1/2007	27th Avalon Benefit 50-Mile Run	80,47	×1
✓ 56	1/4/2006	27th American River 50 Mile Endurance Run	80,47	×1
✓ 57	14/1/2006	26th Avalon Benefit 50-Mile Run	80,47	×1
✓ 58	2/4/2005	26th American River 50 Mile Endurance Run	80,47	×1
✓ 59	3/4/2004	25th American River 50 Mile Endurance Run	80,47	×1
✓ 60	10/1/2004	24th Avalon Benefit 50-Mile Run	80,47	×1
✓ 61	5/4/2003	24th American River 50 Mile Endurance Run	80,47	×1
✓ 62	6/4/2002	23rd American River 50 Mile Endurance Run	80,47	×1
✓ 63	9/2/2002	24th Jed Smith Ultra Classic - 50 Mile Race	80,47	×1
✓ 64	12/1/2002	22nd Avalon Benefit 50-Mile Run	80,47	×1
✓ 65	12/5/2001	18th Quicksilver 50 Mile Endurance Run	80,47	×1
✓ 66	11/11/2000	5th Helen Klein Ultra Classic 50mi	80,47	×1
✓ 67	13/11/1999	4th Helen Klein Ultra Classic 50mi	80,47	×1
✓ 68	10/4/1999	20th American River 50 Mile Endurance Run	80,47	×1
✓ 69	14/11/1998	3rd Helen Klein Ultra Classic 50mi	80,47	×1
✓ 70	10/10/1998	16th Dick Collins Firetrails 50 Mile	80,47	×1
✓ 71	4/4/1998	19th American River 50 Mile Endurance Run	80,47	×1
✓ 72	6/12/1997	2nd Hunter S. Thompson Fear & Loathing 50 Miles	80,47	×1
✓ 73	17/5/1997	12th Silver State 50 Miles	80,47	×1
✓ 74	26/4/1997	California 50 Mile Endurance Run	80,47	×1
✓ 75	5/4/1997	18th American River 50 Mile Endurance Run	80,47	×1
✓ 76	14/12/1996	1st Hunter S. Thompson Fear & Loathing 50 Miles	80,47	×1
✓ 77	12/10/1996	14th Dick Collins Firetrails 50 Mile	80,47	×1
✓ 78	6/4/1996	17th American River 50 Mile Endurance Run	80,47	×1
✓ 79	1/4/1995	16th American River 50 Mile Endurance Run	80,47	×1
✓ 80	2/4/1994	15th American River 50 Mile Endurance Run	80,47	×1
81	8/5/1993	10th Quicksilver 50 Mile Endurance Run	80,47	×1
82	3/4/1993	14th American River 50 Mile Endurance Run	80,47	×1
83	9/5/1992	9th Quicksilver 50 Mile Endurance Run	80,47	×1
84	11/1/2000	Epiphany Ultras - The Real Deal	78,86	—
85	16/5/1998	26. GutsMuths-Rennsteiglauf	76,00	—
86	6/1/1997	Epiphany Ultras - The Real Deal	74,03	—
87	23/8/2003	6th Tamalpa Headlands 50K	50,69	—
88	20/3/2010	2nd Diablo Trails Challenge	50,00	—
89	3/8/2008	27th Skyline 50k Endurance Run	50,00	—
90	21/6/2008	5th Pacifica 50 km Trail Run - Summer Edition	50,00	—
91	5/8/2007	26th Skyline 50k Endurance Run	50,00	—
92	24/3/2007	6th Pirates Cove Trail Run	50,00	—
93	6/8/2006	25th Skyline 50k Endurance Run	50,00	—
94	25/3/2006	5th Pirates Cove Trail Run	50,00	—
95	7/8/2005	24th Skyline 50k Endurance Run	50,00	—
96	19/3/2005	3rd Rucky Chucky Roundabout 50K	50,00	—
97	13/11/2004	2nd Stinson Beach 50 km	50,00	—
98	20/3/2004	2nd Rucky Chucky Roundabout 50K	50,00	—
99	13/3/2004	15th Way Too Cool 50K Endurance Run	50,00	—
100	20/12/2003	Muir Beach Trail Run	50,00	—
101	3/8/2003	22nd Skyline 50k Endurance Run	50,00	—
102	8/3/2003	14th Way Too Cool 50K Endurance Run	50,00	—
103	9/3/2002	13th Way Too Cool 50K Endurance Run	50,00	—
104	5/8/2001	20th Skyline 50k Endurance Run	50,00	—
105	10/3/2001	12th Way Too Cool 50K Endurance Run	50,00	—
106	5/8/2000	19th Skyline 50k Endurance Run	50,00	—
107	11/3/2000	11th Way Too Cool 50K Endurance Run	50,00	—
108	15/5/1999	14th Silver State 50 km	50,00	—
109	8/5/1999	16th Quicksilver 50 km Endurance Run	50,00	—
110	13/3/1999	10th Way Too Cool 50K Endurance Run	50,00	—
111	13/2/1999	21st Jed Smith Ultra Classic - 50 km Race	50,00	—
112	1/8/1998	17th Skyline 50k Endurance Run	50,00	—
113	14/3/1998	9th Way Too Cool 50K Endurance Run	50,00	—
114	2/8/1997	16th Skyline 50k Endurance Run	50,00	—
115	15/3/1997	8th Way Too Cool 50K Endurance Run	50,00	—
116	22/9/1996	Down and Up Ruck-a-Chuck	50,00	—
117	24/8/1996	2nd Point Reyes 50K	50,00	—
118	24/5/1996	9th Ohlone 50K Wilderness Run	50,00	—
119	7/8/1994	13th Skyline 50k Endurance Run	50,00	—
120	15/5/1994	7th Ohlone 50K Wilderness Run	50,00	—
121	9/1/1999	Epiphany Ultras - The Popular But Wussy Metric	48,00	—
122	24/11/2007	23rd Quad Dipsea Trail Run	45,06	—
123	25/11/2006	22nd Quad Dipsea Trail Run	45,06	—
124	26/11/2005	21st Quad Dipsea Trail Run	45,06	—
125	27/11/2004	20th Quad Dipsea Trail Run	45,06	—
126	30/11/2002	18th Quad Dipsea Trail Run	45,06	—
127	28/11/1998	14th Quad Dipsea Trail Run	45,06	—
128	28/11/1992	8th Quad Dipsea Trail Run	45,06	—