Howard Mayson

ID 209718

Born : 1952 Cat. M70 Ultrarunner since 2009

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

76,5%

Rank quotient ?This runner's calculation uses 63 eligible race(s): Σ(rank − 1) = 7 012; Σ finishers = 9 161. 7 012 / 9 161 × 100 = 76.54%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed63

Km — ultra races4 250 km

> 100 km3

> 160 km3

Longest race160,9 km

15th Heartland 100 Mile Race — 11/10/2014

Km per year (ultra races)

255

2022

250

2023

2024

2025

230

2026

Race types (share of distance)

Trail100,0%

Records

50 km6h30'44 100 km17h26'11 50 mi10h59'39 100 mi25h49'45

HISTORY

63 race(s)

Date		Race	Perf.	Rk
2026
01.08	50km	1st Wilnter Park Trail Runs	10:32:53 h	81
11.07	50mi	19th Leadville Silver Rush 50 Mile Run	12:26:07 h	404
30.05	50km	17th North Fork 50 km Trail Race	10:02:32 h	160
31.01	50km	9th Arches Ultra 50 km Race	9:20:21 h	222
2025
31.05	50km	16th North Fork 50 km Trail Race	8:27:51 h	167
2024
01.06	50km	15th North Fork 50 km Trail Race	8:59:01 h	169
2023
22.09	50km	2nd Red Feather Trail Jamboree - 50k	9:28:20 h	93
09.09	50km	10th Devil on the Divide Ultra	10:45:08 h	120
03.06	50km	14th North Fork 50 km Trail Race	8:30:51 h	143
15.04	50km	13th Oriflamme 50K Trail Run	8:50:23 h	76
25.03	50km	10th Behind the Rocks 50km Race	8:42:28 h	125
2022
10.09	50km	9th Devil on the Divide Ultra	9:55:50 h	113
06.08	50km	8th Sheep Mountain 50 km Endurance Run	10:14:00 h	49
04.06	50km	13th North Fork 50 km Trail Race	8:35:23 h	116
26.03	50km	9th Behind the Rocks 50km Race	8:59:15 h	177
19.02	55km	16th Moab Red Hot 55k	8:29:08 h	156
2021
13.11	60km	1st Kessel Run 60 km Ultra Race	10:26:00 h	36
07.08	50km	7th Sheep Mountain 50 km Endurance Run	9:27:00 h	33
05.06	50km	12th North Fork 50 km Trail Race	8:13:56 h	120
27.03	50km	8th Behind the Rocks 50km Race	8:25:38 h	184
13.02	55km	15th Moab Red Hot 55k	8:19:10 h	118
2020
19.09	50km	3rd Sangre de Cristo Ultra 50 km Race	8:37:00 h	43
01.08	50km	6th Sheep Mountain 50 km Endurance Run	9:08:00 h	40
27.06	50km	1st Bears Ears 50 km Ultra Race	9:49:37 h	69
2019
16.11	50km	13th Old Goat's 50 km Trail Race	10:52:15 h	11
19.10	50km	1st That's No Moon Ultras 50K	8:28:23 h	20
07.09	50km	6th Devil on the Divide Ultra	8:54:20 h	93
06.07	50mi	12th Leadville Silver Rush 50 Mile Run	12:26:07 h	402
01.06	50km	10th North Fork 50 km Trail Race	7:42:51 h	110
11.05	50mi	16th PCT 50 Mile Trail Run	14:15:32 h	115
2018
17.11	50km	4th Dead Horse 50 km Race	6:30:44 h	197
08.09	50km	5th Devil on the Divide Ultra	9:24:38 h	102
02.06	50km	9th North Fork 50 km Trail Race	7:27:28 h	73
19.05	50mi	15th PCT 50 Mile Trail Run	12:41:11 h	72
13.01	46.5mi	6th San Diego 50 Mile Trail	11:16:08 h	81
2017
30.09	50km	8th The Bear Chase 50 km	6:35:21 h	81
09.07	50mi	10th Leadville Silver Rush 50 Mile Run	13:04:10 h	254
13.05	50mi	14th PCT 50 Mile Trail Run	13:03:57 h	106
2016
24.09	100km	1st Silverton Ultra Dirty - 100K	20:05:00 h	26
03.09	65km	3rd Grand Traverse Mountain Run	10:53:42 h	66
09.07	50mi	2nd Capitol Reef 50 Mile	14:33:17 h	31
04.06	50mi	7th North Fork 50 Mile Trail Race	12:09:49 h	53
14.05	50mi	13th PCT 50 Mile Trail Run	12:39:40 h	102
27.02	50km	2nd Sycamore Canyon 50k	7:30:20 h	20
06.02	50km	3rd Sean O'Brien 50 km Trail Race	8:20:03 h	81
2015
01.08	50mi	1st Pikes Peak Ultra	14:52:39 h	18
27.06	50mi	21st San Juan Solstice 50 Mile Run	15:51:47 h	182
14.06	28mi	1st South Park Trail Marathon	5:36:00 h	38
28.03	50mi	3rd Prairie Spirit 50 Mile Trail Ultra Race	10:59:39 h	58
2014
11.10	100mi	15th Heartland 100 Mile Race	25:49:45 h	19
06.09	100km	4th Ultra Race of Champions (UROC) 100K	17:26:11 h	48
13.07	50mi	7th Leadville Silver Rush 50 Mile Run	11:38:22 h	235
17.05	50km	7th Sage Burner Trail Run	7:42:39 h	35
2013
12.10	100mi	7th Boulder 100 Mile Run	28:13:00 h	5
14.07	50mi	6th Leadville Silver Rush 50 Mile Run	11:48:36 h	274
29.06	50mi	4th North Fork 50 Mile Trail Race	12:57:13 h	51
31.05	100mi	1st Bryce 100 Mile Trail Run	35:01:33 h	107
2012
28.07	52mi	3rd Grand Mesa 50 Mile Trail Race	12:08:00 h	15
15.07	50mi	5th Leadville Silver Rush 50 Mile Run	12:05:56 h	295
02.06	50km	4th Golden Gate Dirty 30	7:41:25 h	178
2011
17.07	50mi	4th Leadville Silver Rush 50 Mile Run	11:48:43 h	194
2010
18.07	50mi	3rd Leadville Silver Rush 50 Mile Run	11:42:24 h	120
2009
26.07	50mi	2nd Leadville Silver Rush 50 Mile Run	11:25:48 h	93

Filter

Runner	Races in common

DUV-index calculation details

#	Date	Race	Credited km	DUV-index+
✓ 1	11/10/2014	15th Heartland 100 Mile Race	160,93	×3
✓ 2	12/10/2013	7th Boulder 100 Mile Run	160,93	×3
✓ 3	31/5/2013	1st Bryce 100 Mile Trail Run	160,93	×3
✓ 4	24/9/2016	1st Silverton Ultra Dirty - 100K	100,00	×2
✓ 5	6/9/2014	4th Ultra Race of Champions (UROC) 100K	100,00	×2
✓ 6	28/7/2012	3rd Grand Mesa 50 Mile Trail Race	83,69	×1
✓ 7	11/7/2026	19th Leadville Silver Rush 50 Mile Run	80,47	×1
✓ 8	6/7/2019	12th Leadville Silver Rush 50 Mile Run	80,47	×1
✓ 9	11/5/2019	16th PCT 50 Mile Trail Run	80,47	×1
✓ 10	19/5/2018	15th PCT 50 Mile Trail Run	80,47	×1
✓ 11	9/7/2017	10th Leadville Silver Rush 50 Mile Run	80,47	×1
✓ 12	13/5/2017	14th PCT 50 Mile Trail Run	80,47	×1
✓ 13	9/7/2016	2nd Capitol Reef 50 Mile	80,47	×1
✓ 14	4/6/2016	7th North Fork 50 Mile Trail Race	80,47	×1
✓ 15	14/5/2016	13th PCT 50 Mile Trail Run	80,47	×1
✓ 16	1/8/2015	1st Pikes Peak Ultra	80,47	×1
✓ 17	27/6/2015	21st San Juan Solstice 50 Mile Run	80,47	×1
✓ 18	28/3/2015	3rd Prairie Spirit 50 Mile Trail Ultra Race	80,47	×1
✓ 19	13/7/2014	7th Leadville Silver Rush 50 Mile Run	80,47	×1
✓ 20	14/7/2013	6th Leadville Silver Rush 50 Mile Run	80,47	×1
✓ 21	29/6/2013	4th North Fork 50 Mile Trail Race	80,47	×1
✓ 22	15/7/2012	5th Leadville Silver Rush 50 Mile Run	80,47	×1
✓ 23	17/7/2011	4th Leadville Silver Rush 50 Mile Run	80,47	×1
✓ 24	18/7/2010	3rd Leadville Silver Rush 50 Mile Run	80,47	×1
✓ 25	26/7/2009	2nd Leadville Silver Rush 50 Mile Run	80,47	×1
✓ 26	13/1/2018	6th San Diego 50 Mile Trail	74,83	×1
✓ 27	3/9/2016	3rd Grand Traverse Mountain Run	65,00	×1
✓ 28	13/11/2021	1st Kessel Run 60 km Ultra Race	60,00	×1
✓ 29	19/2/2022	16th Moab Red Hot 55k	55,00	×1
✓ 30	13/2/2021	15th Moab Red Hot 55k	55,00	×1
✓ 31	1/8/2026	1st Wilnter Park Trail Runs	50,00	×1
✓ 32	30/5/2026	17th North Fork 50 km Trail Race	50,00	×1
✓ 33	31/1/2026	9th Arches Ultra 50 km Race	50,00	×1
✓ 34	31/5/2025	16th North Fork 50 km Trail Race	50,00	×1
✓ 35	1/6/2024	15th North Fork 50 km Trail Race	50,00	×1
✓ 36	22/9/2023	2nd Red Feather Trail Jamboree - 50k	50,00	×1
✓ 37	9/9/2023	10th Devil on the Divide Ultra	50,00	×1
✓ 38	3/6/2023	14th North Fork 50 km Trail Race	50,00	×1
✓ 39	15/4/2023	13th Oriflamme 50K Trail Run	50,00	×1
✓ 40	25/3/2023	10th Behind the Rocks 50km Race	50,00	×1
✓ 41	10/9/2022	9th Devil on the Divide Ultra	50,00	×1
✓ 42	6/8/2022	8th Sheep Mountain 50 km Endurance Run	50,00	×1
✓ 43	4/6/2022	13th North Fork 50 km Trail Race	50,00	×1
✓ 44	26/3/2022	9th Behind the Rocks 50km Race	50,00	×1
✓ 45	7/8/2021	7th Sheep Mountain 50 km Endurance Run	50,00	×1
✓ 46	5/6/2021	12th North Fork 50 km Trail Race	50,00	×1
✓ 47	27/3/2021	8th Behind the Rocks 50km Race	50,00	×1
✓ 48	19/9/2020	3rd Sangre de Cristo Ultra 50 km Race	50,00	×1
✓ 49	1/8/2020	6th Sheep Mountain 50 km Endurance Run	50,00	×1
✓ 50	27/6/2020	1st Bears Ears 50 km Ultra Race	50,00	×1
51	16/11/2019	13th Old Goat's 50 km Trail Race	50,00	×1
52	19/10/2019	1st That's No Moon Ultras 50K	50,00	×1
53	7/9/2019	6th Devil on the Divide Ultra	50,00	×1
54	1/6/2019	10th North Fork 50 km Trail Race	50,00	×1
55	17/11/2018	4th Dead Horse 50 km Race	50,00	×1
56	8/9/2018	5th Devil on the Divide Ultra	50,00	×1
57	2/6/2018	9th North Fork 50 km Trail Race	50,00	×1
58	30/9/2017	8th The Bear Chase 50 km	50,00	×1
59	27/2/2016	2nd Sycamore Canyon 50k	50,00	×1
60	6/2/2016	3rd Sean O'Brien 50 km Trail Race	50,00	×1
61	17/5/2014	7th Sage Burner Trail Run	50,00	×1
62	2/6/2012	4th Golden Gate Dirty 30	50,00	×1
63	14/6/2015	1st South Park Trail Marathon	45,06	—