David Denison

Born : 1961 Cat. M65 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

65,7%

Rank quotient ?This runner's calculation uses 61 eligible race(s): Σ(rank − 1) = 11 884; Σ finishers = 18 100. 11 884 / 18 100 × 100 = 65.66%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed61

Km — ultra races3 773 km

> 100 km1

> 160 km1

Longest race160,9 km

13th Tahoe Rim Trail 100M Endurance Run — 19/7/2014

Km per year (ultra races)

206

2022

145

2023

2024

2025

2026

Race types (share of distance)

Trail100,0%

Records

50 km5h54'44 100 km13h52'48 50 mi11h02'51 100 mi34h08'38

HISTORY

61 race(s)

Date		Race	Perf.	Rk
2025
29.11	28.4mi	40th Quad Dipsea Trail Run	8:54:24 h	255
26.04	50km	12th The Canyons Endurance 50 km Run	8:31:33 h	536
2024
30.11	28mi	39th Quad Dipsea Trail Run	8:03:31 h	233
06.04	50km	15th Diablo Trails Challenge	8:52:28 h	92
2023
25.11	28mi	38th Quad Dipsea Trail Run	8:19:23 h	306
13.05	50km	40th Quicksilver 50 km Endurance Run	10:39:58 h	127
08.04	50km	14th Diablo Trails Challenge	8:23:31 h	75
2022
26.11	28mi	37th Quad Dipsea Trail Run	7:59:45 h	241
16.07	50mi	21th Tahoe Rim Trail 50M Endurance Run	16:59:58 h	130
09.04	50mi	14th Lake Sonoma 50 Mile Race	13:16:52 h	217
2021
27.11	28mi	36th Quad Dipsea Trail Run	7:36:08 h	194
23.10	100km	38th Quicksilver 100 km Endurance Run	16:34:44 h	130
17.07	50mi	20th Tahoe Rim Trail 50M Endurance Run	16:24:25 h	95
2019
30.11	28mi	35th Quad Dipsea Trail Run	6:43:14 h	127
20.07	50mi	18th Tahoe Rim Trail 50M Endurance Run	13:53:51 h	97
13.04	50km	11th Diablo Trails Challenge	7:41:30 h	63
2018
24.11	28mi	34th Quad Dipsea Trail Run	7:06:20 h	151
21.07	50mi	17th Tahoe Rim Trail 50M Endurance Run	14:28:25 h	103
10.03	50km	7th Marin Ultra Challenge 50 km Race	7:00:09 h	152
2017
25.11	28mi	33rd Quad Dipsea Trail Run	7:54:35 h	241
06.05	100km	22nd Miwok 100k Trail Race	15:23:10 h	266
15.04	50mi	9th Lake Sonoma 50 Mile Race	12:25:59 h	217
11.03	50km	6th Marin Ultra Challenge 50 km Race	6:26:29 h	101
2016
26.11	28mi	32nd Quad Dipsea Trail Run	8:10:45 h	241
14.05	100km	33rd Quicksilver 100 km Endurance Run	15:49:33 h	144
09.04	50mi	8th Lake Sonoma 50 Mile Race	12:20:15 h	245
05.03	50km	27th Way Too Cool 50K Endurance Run	6:47:11 h	521
2015
28.11	28mi	31st Quad Dipsea Trail Run	7:20:57 h	207
09.05	50km	32nd Quicksilver 50 km Endurance Run	6:47:23 h	69
07.03	50km	26th Way Too Cool 50K Endurance Run	6:30:24 h	591
2014
29.11	28mi	30th Quad Dipsea Trail Run	7:01:53 h	148
19.07	100mi	13th Tahoe Rim Trail 100M Endurance Run	34:08:38 h	153
03.05	100km	19th Miwok 100k Trail Race	15:05:30 h	268
08.03	50km	25th Way Too Cool 50K Endurance Run	6:01:42 h	448
2013
30.11	28mi	29th Quad Dipsea Trail Run	7:17:54 h	182
11.05	50km	30th Quicksilver 50 km Endurance Run	6:37:51 h	53
04.05	60km	18th Miwok 60k Trail race	8:16:05 h	207
09.03	50km	24th Way Too Cool 50K Endurance Run	6:19:49 h	541
2012
24.11	28mi	28th Quad Dipsea Trail Run	6:53:59 h	103
21.07	50mi	11th Tahoe Rim Trail 50M Endurance Run	13:25:25 h	88
20.05	50km	25th Ohlone 50K Wilderness Run	8:12:00 h	118
12.05	50km	29th Quicksilver 50 km Endurance Run	6:48:05 h	66
2011
26.11	28mi	27th Quad Dipsea Trail Run	6:39:33 h	128
07.05	100km	16th Miwok 100k Trail race	15:23:43 h	252
30.04	50km	28th Quicksilver 50 km Endurance Run	6:49:27 h	69
12.03	50km	22nd Way Too Cool 50K Endurance Run	6:23:42 h	340
2009
28.11	28mi	25th Quad Dipsea Trail Run	6:30:03 h	97
18.07	50mi	8th Tahoe Rim Trail 50M Endurance Runs	14:01:27 h	75
02.05	100km	14th Miwok 100k Trail race	14:31:12 h	195
14.03	50km	20th Way Too Cool 50K Endurance Run	6:13:32 h	265
2008
29.11	28mi	24th Quad Dipsea Trail Run	6:35:35 h	137
11.10	50mi	26th Dick Collins Firetrails 50 Mile	11:02:51 h	113
20.09	50km	1st Skyline to the Sea 50km	6:02:40 h	65
03.05	100km	13th Miwok 100k Trail race	13:52:48 h	196
12.04	50mi	1st Lake Sonoma 50 Mile Race	11:58:36 h	42
08.03	50km	19th Way Too Cool 50K Endurance Run	6:02:00 h	259
2007
24.11	28mi	23rd Quad Dipsea Trail Run	6:44:29 h	153
10.03	50km	18th Way Too Cool 50K Endurance Run	6:06:30 h	265
2006
11.03	50km	17th Way Too Cool 50K Endurance Run	6:20:33 h	227
2004
13.03	50km	15th Way Too Cool 50K Endurance Run	6:05:22 h	260
2003
08.03	50km	14th Way Too Cool 50K Endurance Run	5:54:44 h	265

Filter

Runner	Races in common

DUV-index calculation details

#	Date	Race	Credited km	DUV-index+
✓ 1	19/7/2014	13th Tahoe Rim Trail 100M Endurance Run	160,93	×3
✓ 2	23/10/2021	38th Quicksilver 100 km Endurance Run	100,00	×2
✓ 3	6/5/2017	22nd Miwok 100k Trail Race	100,00	×2
✓ 4	14/5/2016	33rd Quicksilver 100 km Endurance Run	100,00	×2
✓ 5	3/5/2014	19th Miwok 100k Trail Race	100,00	×2
✓ 6	7/5/2011	16th Miwok 100k Trail race	100,00	×2
✓ 7	2/5/2009	14th Miwok 100k Trail race	100,00	×2
✓ 8	3/5/2008	13th Miwok 100k Trail race	100,00	×2
✓ 9	16/7/2022	21th Tahoe Rim Trail 50M Endurance Run	80,47	×1
✓ 10	9/4/2022	14th Lake Sonoma 50 Mile Race	80,47	×1
✓ 11	17/7/2021	20th Tahoe Rim Trail 50M Endurance Run	80,47	×1
✓ 12	20/7/2019	18th Tahoe Rim Trail 50M Endurance Run	80,47	×1
✓ 13	21/7/2018	17th Tahoe Rim Trail 50M Endurance Run	80,47	×1
✓ 14	15/4/2017	9th Lake Sonoma 50 Mile Race	80,47	×1
✓ 15	9/4/2016	8th Lake Sonoma 50 Mile Race	80,47	×1
✓ 16	21/7/2012	11th Tahoe Rim Trail 50M Endurance Run	80,47	×1
✓ 17	18/7/2009	8th Tahoe Rim Trail 50M Endurance Runs	80,47	×1
✓ 18	11/10/2008	26th Dick Collins Firetrails 50 Mile	80,47	×1
✓ 19	12/4/2008	1st Lake Sonoma 50 Mile Race	80,47	×1
✓ 20	4/5/2013	18th Miwok 60k Trail race	60,00	×1
✓ 21	26/4/2025	12th The Canyons Endurance 50 km Run	50,00	×1
✓ 22	6/4/2024	15th Diablo Trails Challenge	50,00	×1
✓ 23	13/5/2023	40th Quicksilver 50 km Endurance Run	50,00	×1
✓ 24	8/4/2023	14th Diablo Trails Challenge	50,00	×1
✓ 25	13/4/2019	11th Diablo Trails Challenge	50,00	×1
✓ 26	10/3/2018	7th Marin Ultra Challenge 50 km Race	50,00	×1
✓ 27	11/3/2017	6th Marin Ultra Challenge 50 km Race	50,00	×1
✓ 28	5/3/2016	27th Way Too Cool 50K Endurance Run	50,00	×1
✓ 29	9/5/2015	32nd Quicksilver 50 km Endurance Run	50,00	×1
✓ 30	7/3/2015	26th Way Too Cool 50K Endurance Run	50,00	×1
✓ 31	8/3/2014	25th Way Too Cool 50K Endurance Run	50,00	×1
✓ 32	11/5/2013	30th Quicksilver 50 km Endurance Run	50,00	×1
✓ 33	9/3/2013	24th Way Too Cool 50K Endurance Run	50,00	×1
✓ 34	20/5/2012	25th Ohlone 50K Wilderness Run	50,00	×1
✓ 35	12/5/2012	29th Quicksilver 50 km Endurance Run	50,00	×1
✓ 36	30/4/2011	28th Quicksilver 50 km Endurance Run	50,00	×1
✓ 37	12/3/2011	22nd Way Too Cool 50K Endurance Run	50,00	×1
✓ 38	14/3/2009	20th Way Too Cool 50K Endurance Run	50,00	×1
✓ 39	20/9/2008	1st Skyline to the Sea 50km	50,00	×1
✓ 40	8/3/2008	19th Way Too Cool 50K Endurance Run	50,00	×1
✓ 41	10/3/2007	18th Way Too Cool 50K Endurance Run	50,00	×1
✓ 42	11/3/2006	17th Way Too Cool 50K Endurance Run	50,00	×1
✓ 43	13/3/2004	15th Way Too Cool 50K Endurance Run	50,00	×1
✓ 44	8/3/2003	14th Way Too Cool 50K Endurance Run	50,00	×1
✓ 45	29/11/2025	40th Quad Dipsea Trail Run	45,71	—
46	30/11/2024	39th Quad Dipsea Trail Run	45,06	—
47	25/11/2023	38th Quad Dipsea Trail Run	45,06	—
48	26/11/2022	37th Quad Dipsea Trail Run	45,06	—
49	27/11/2021	36th Quad Dipsea Trail Run	45,06	—
50	30/11/2019	35th Quad Dipsea Trail Run	45,06	—
51	24/11/2018	34th Quad Dipsea Trail Run	45,06	—
52	25/11/2017	33rd Quad Dipsea Trail Run	45,06	—
53	26/11/2016	32nd Quad Dipsea Trail Run	45,06	—
54	28/11/2015	31st Quad Dipsea Trail Run	45,06	—
55	29/11/2014	30th Quad Dipsea Trail Run	45,06	—
56	30/11/2013	29th Quad Dipsea Trail Run	45,06	—
57	24/11/2012	28th Quad Dipsea Trail Run	45,06	—
58	26/11/2011	27th Quad Dipsea Trail Run	45,06	—
59	28/11/2009	25th Quad Dipsea Trail Run	45,06	—
60	29/11/2008	24th Quad Dipsea Trail Run	45,06	—
61	24/11/2007	23rd Quad Dipsea Trail Run	45,06	—