Marc Sanderson

Born : 1971 Cat. M55 Ultrarunner since 2000

DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.

103

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

44,8%

Rank quotient ?This runner's calculation uses 116 eligible race(s): Σ(rank − 1) = 5 736; Σ finishers = 12 813. 5 736 / 12 813 × 100 = 44.77%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed116

Km — ultra races18 472 km

> 100 km59

> 160 km53

> 200 km22

> 24h35

> 48h25

Longest race736,8 km

41th Across the Years, 6 days — 28/12/2024

Km per year (ultra races)

2 143

2022

1 864

2023

1 995

2024

2 376

2025

757

2026

Race types (share of distance)

Road51,2%

Trail40,1%

Elim.6,6%

?2,1%

Wins & podiums (ultra)

🏆 Win11

🏆 Win M15

🏅 Top 322

🏅 Top 3 M26

Longest winning streak5

Current streak1

Records

50 km4h54'22 100 km14h31'15 50 mi7h56'08 100 mi19h48'10 12 h100,69 km 24 h147,50 km 48 h297,33 km 6 d736,78 km Backyard15 loops

HISTORY

116 race(s) · 5 split(s) nested

Date		Race	Perf.	Rk
2026
03.09	100h	3rd Front Range Ultra Dayze 100h	482.803 km	1 🏆
22.08	12h	10th Jackrabbit Jubilee 12 Hour Run	72.999 km	14
30.05	24h	10th Hotfoot Hamster 24 Hour Run	147.499 km	5
25.04	Backyard Ultra	5th Bonneville Backyard Ultra	53.648 km (8h)	83
2025
28.12	48h	41st Across the Years, 48h	186.188 km	12
12.12	26h	8th Last One Standing Ultra Marathon	48.280 km	61
21.11	48h	7th Fat Ox 48 Hour Run	286.257 km	2 🥈
01.11	12h	2nd Liberty Park Endurance 12h Runs	91.539 km	5
10.10	48h	1st The Biggest Little Ultra - 48h	294.310 km	1 🏆
26.09	200mi	4th Cowboy 200	2d 14:43:14 h	7
28.08	100h	2nd Front Range Ultra Dayze 100h	489.240 km	1 🏆
26.04	Backyard Ultra	4th Bonneville Backyard Ultra	80.472 km (12h)	28
13.03	48h	14th Pulse Endurance Runs (Pickled Feet) 48 Hour	280.025 km	1 🏆
14.02	48h	12th Jackpot Ultra Running Festival 48 Hour Race	297.327 km	1 🏆
2024
28.12	6d	41th Across the Years, 6 days	736.775 km	1 🏆
06.12	26h	7th Last One Standing Ultra Marathon	164.153 km	1 🏆
22.11	48h	6th Fat Ox 48 Hour Run	257.631 km	1 🏆
09.11	12h	1st Liberty Park Endurance 12h Runs	100.693 km	4
30.08	11h	5th Dusk to Dawn Relay Race	86.904 km	1 🏆
27.04	Backyard Ultra	3rd Bonneville Backyard Ultra	100.590 km (15h)	18
14.03	48h	13th Pulse Endurance Runs (Pickled Feet) 48 Hour	271.818 km	2 🥈
16.02	48h	11th Jackpot Ultra Running Festival 48 Hour Race	276.927 km	3 🥉
2023
28.12	6d	39th Across the Years, 6 days	564.482 km	7
08.12	26h	6th Last One Standing Ultra Marathon	164.153 km	13
17.11	48h	5th Fat Ox 48 Hour Run	176.490 km	7
26.08	12h	7th Jackrabbit Jubilee 12 Hour Run	75.500 km	19
16.06	72h	6th Six Days in the Dome - The Redux 72 Hour	388.910 km	1 🏆
16.06	50km	6th Six Days in the Dome - The Redux 72 Hour 50km Split	10:18:20 h	1 🏆
16.06	50mi	6th Six Days in the Dome - The Redux 72 Hour 50mi Split	13:02:36 h	1 🏆
16.06	100mi	6th Six Days in the Dome - The Redux 72 Hour 100mi Split	21:44:05 h	1 🏆
29.04	Backyard Ultra	2nd Bonneville Backyard Ultra	67.060 km (10h)	9
16.03	48h	12th Pulse Endurance Runs (Pickled Feet) 48 Hour	241.594 km	1 🏆
03.03	48h	10th Jackpot Ultra Running Festival 48 Hour Race	185.854 km	12
2022
28.12	6d	38th Across the Years, 6 days	613.776 km	3 🥉
10.12	17h	5th Last One Standing Ultra Marathon	164.153 km	3 🥉
02.12	48h	4th Fat Ox 48 Hour Run	276.646 km	2 🥈
14.10	24h	2nd Ultimate Unicorn 24 Hour Challenge	96.560 km	9
03.09	24h	6th Hotfoot Hamster 24 Hour Run	69.523 km	13
04.06	12h	6th Jackrabbit Jubilee 12 Hour Run	80.950 km	19
30.04	Backyard Ultra	1st Bonneville Backyard Ultra	100.590 km (15h)	4
07.04	72h	10th Beyond Limits Ultra Race 72 Hour	173.809 km	15
18.03	48h	11th Pulse Endurance Runs (Pickled Feet) 48 Hour	245.199 km	2 🥈
18.02	72h	9th Jackpot Ultra Running Festival 72 Hour Race	321.868 km	6
2021
28.12	6d	37th Across the Years, 6 days	647.500 km	4
19.11	48h	3rd Fat Ox 48 Hour Run	274.071 km	2 🥈
22.10	24h	1st Ultimate Unicorn 24 Hour Challenge	128.747 km	2 🥈
03.09	17h	4th Last One Standing Ultra Marathon	164.153 km	4
29.05	50mi	9th Bryce 50 Mile Trail Run	14:13:01 h	89
2020
16.10	100mi	15th Pony Express Trail 100 Mile	29:50:17 h	31
25.09	100mi	22nd The Bear 100 Mile Endurance Run	35:10:50 h	195
04.09	17h	3rd Last One Standing Ultra Marathon	106.216 km	9
13.06	50mi	24th Snow Peaks 50 Mile Trail Run	15:29:47 h	191
14.02	48h	7th Jackpot Ultra Running Festival 48 Hour Race	160.934 km	50
2019
28.12	6d	35th Across the Years, 6 days	563.196 km	4
28.12	100km	35th Across the Years, 6 days - 100km Split	13:09:32 h	2 🥈
28.12	100mi	35th Across the Years, 6 days - 100mi Split	23:57:26 h	2 🥈
27.09	100mi	21st The Bear 100 Mile Endurance Run	34:55:20 h	172
10.08	50km	1st Elephant Rock 50km Trail Run	12:50:30 h	9
03.08	100km	18th Katcina Mosa 100K Mountain Run	23:14:01 h	43
23.03	50mi	14th Antelope Island Buffalo Run 50 Mile	12:10:44 h	60
26.01	50km	2nd Arches Ultra 50 km Race	7:49:06 h	163
2018
17.11	50km	4th Dead Horse 50 km Race	6:47:06 h	214
02.06	50mi	22nd Snow Peaks 50 Mile Trail Run	16:29:53 h	260
24.03	50km	13th Antelope Island Buffalo Run 50 km	7:51:59 h	105
2016
04.06	50mi	20th Snow Peaks 50 Mile Trail Run	13:16:59 h	113
19.03	50mi	11th Antelope Island Buffalo Run 50 Mile	9:55:11 h	46
2015
11.09	100mi	36th Wasatch Front 100 Mile	32:49:43 h	122
01.08	100km	14th Katcina Mosa 100K Mountain Run	17:33:20 h	27
06.06	50mi	19th Snow Peaks 50 Mile Trail Run	12:25:05 h	92
21.03	50mi	10th Antelope Island Buffalo Run 50 Mile	9:39:13 h	60
14.02	55km	9th Moab Red Hot 55k	6:35:10 h	143
2014
05.09	100mi	35th Wasatch Front 100 Mile	34:11:40 h	192
02.08	100km	13th Katcina Mosa 100K Mountain Run	16:51:50 h	20
07.06	50mi	18th Snow Peaks 50 Mile Trail Run	13:34:40 h	121
04.04	100km	3rd The Zion 100 km Run	14:31:15 h	30
22.03	50mi	9th Antelope Island Buffalo Run 50 Mile	9:57:06 h	53
2013
06.09	100mi	34th Wasatch Front 100 Mile	33:56:19 h	141
10.08	100km	12th Katcina Mosa 100K Mountain Run	16:21:49 h	19
23.03	50mi	8th Antelope Island Buffalo Run 50 Mile	12:12:37 h	126
2012
02.06	50mi	16th Snow Peaks 50 Mile Trail Run	12:53:38 h	94
23.03	100mi	7th Antelope Island Buffalo Run 100 Mile	25:33:52 h	19
2011
09.09	100mi	32nd Wasatch Front 100 Mile	29:36:59 h	72
20.08	100mi	29th Leadville Trail 100 Mile	28:48:48 h	238
17.07	50mi	4th Leadville Silver Rush 50 Mile Run	11:53:50 h	200
04.06	50mi	15th Snow Peaks 50 Mile Trail Run	12:55:22 h	74
2010
24.09	100mi	12th The Bear 100 Mile Endurance Run	28:23:18 h	40
10.09	100mi	31st Wasatch Front 100 Mile	27:48:20 h	37
21.08	100mi	28th Leadville Trail 100 Mile	28:06:43 h	191
18.07	50mi	3rd Leadville Silver Rush 50 Mile Run	9:09:09 h	23
05.06	50mi	14th Snow Peaks 50 Mile Trail Run	11:49:16 h	54
27.03	50mi	5th Antelope Island Buffalo Run 50 Mile	9:14:49 h	39
13.02	55km	4th Moab Red Hot 55k	6:43:22 h	96
2009
28.03	50mi	4th Antelope Island Buffalo Run 50 Mile	9:00:22 h	28
14.02	55km	3rd Moab Red Hot 55k	6:31:18 h	90
2008
06.09	100mi	29th Wasatch Front 100 Mile	32:45:14 h	98
22.03	50mi	3rd Antelope Island Buffalo Run 50 Mile	8:14:06 h	4
16.02	55km	2nd Moab Red Hot 55k	6:26:10 h	85
05.01	50mi	1st Running from an Angel 50 Miler	7:56:08 h	3 🥉
2007
28.09	100mi	9th The Bear 100 Mile Endurance Run	27:25:00 h	16
18.08	100mi	25th Leadville Trail 100 Mile	26:34:27 h	68
23.06	50mi	1st Running With The Devil 50 Mile Race	9:25:00 h	3 🥉
02.06	50mi	11th Snow Peaks 50 Mile Trail Run	10:38:21 h	27
24.03	50mi	2nd Antelope Island Buffalo Run 50 Mile	8:04:19 h	4
2006
28.10	50km	2nd Goblin Valley Ultra 50k	5:31:33 h	39
09.09	100mi	27th Wasatch Front 100 Mile	34:35:43 h	124
24.07	135mi	20th Badwater Ultramarathon	46:36:25 h	51
03.06	50mi	10th Snow Peaks 50 Mile Trail Run	14:27:12 h	141
2005
29.10	50km	1st Goblin Valley Ultra 50k	4:54:22 h	21
10.09	100mi	26th Wasatch Front 100 Mile	26:14:16 h	19
06.08	100km	4th Katcina Mosa 100K Mountain Run	16:33:30 h	11
04.06	50mi	9th Snow Peaks 50 Mile Trail Run	14:21:26 h	99
2004
11.09	100mi	25th Wasatch Front 100 Mile	28:09:26 h	23
21.08	100mi	22nd Leadville Trail 100 Mile	27:05:57 h	65
17.07	100mi	16th Vermont 100 Mile Endurance Race	19:48:10 h	22
26.06	100mi	31th Western States 100 Mile Endurance Run	23:44:23 h	79
05.06	50mi	8th Snow Peaks 50 Mile Trail Run	13:33:50 h	110
2003
06.09	100mi	24th Wasatch Front 100 Mile	26:33:04 h	17
07.06	50mi	7th Snow Peaks 50 Mile Trail Run	9:11:51 h	13
11.01	50mi	23rd Avalon Benefit 50-Mile Run	8:03:10 h	15
2001
02.06	50mi	5th Snow Peaks 50 Mile Trail Run	10:24:01 h	18
2000
03.06	50mi	4th Snow Peaks 50 Mile Trail Run	12:45:00 h	72

Filter

Runner	Races in common

DUV-index calculation details

#	Date	Race	Credited km	DUV-index+
✓ 1	28/12/2024	41th Across the Years, 6 days	736,78	×7
✓ 2	28/12/2021	37th Across the Years, 6 days	647,50	×6
✓ 3	28/12/2022	38th Across the Years, 6 days	613,78	×5
✓ 4	28/12/2023	39th Across the Years, 6 days	564,48	×5
✓ 5	28/12/2019	35th Across the Years, 6 days	563,20	×5
✓ 6	28/8/2025	2nd Front Range Ultra Dayze 100h	489,24	×4
✓ 7	3/9/2026	3rd Front Range Ultra Dayze 100h	482,80	×4
✓ 8	16/6/2023	6th Six Days in the Dome - The Redux 72 Hour	388,91	×3
✓ 9	26/9/2025	4th Cowboy 200	321,87	×3
✓ 10	18/2/2022	9th Jackpot Ultra Running Festival 72 Hour Race	321,87	×3
✓ 11	14/2/2025	12th Jackpot Ultra Running Festival 48 Hour Race	297,33	×2
✓ 12	10/10/2025	1st The Biggest Little Ultra - 48h	294,31	×2
✓ 13	21/11/2025	7th Fat Ox 48 Hour Run	286,26	×2
✓ 14	13/3/2025	14th Pulse Endurance Runs (Pickled Feet) 48 Hour	280,03	×2
✓ 15	16/2/2024	11th Jackpot Ultra Running Festival 48 Hour Race	276,93	×2
✓ 16	2/12/2022	4th Fat Ox 48 Hour Run	276,65	×2
✓ 17	19/11/2021	3rd Fat Ox 48 Hour Run	274,07	×2
✓ 18	14/3/2024	13th Pulse Endurance Runs (Pickled Feet) 48 Hour	271,82	×2
✓ 19	22/11/2024	6th Fat Ox 48 Hour Run	257,63	×2
✓ 20	18/3/2022	11th Pulse Endurance Runs (Pickled Feet) 48 Hour	245,20	×2
✓ 21	16/3/2023	12th Pulse Endurance Runs (Pickled Feet) 48 Hour	241,59	×2
✓ 22	24/7/2006	20th Badwater Ultramarathon	217,26	×2
✓ 23	28/12/2025	41st Across the Years, 48h	186,19	×1
✓ 24	3/3/2023	10th Jackpot Ultra Running Festival 48 Hour Race	185,85	×1
✓ 25	17/11/2023	5th Fat Ox 48 Hour Run	176,49	×1
✓ 26	7/4/2022	10th Beyond Limits Ultra Race 72 Hour	173,81	×1
✓ 27	6/12/2024	7th Last One Standing Ultra Marathon	164,15	×1
✓ 28	8/12/2023	6th Last One Standing Ultra Marathon	164,15	×1
✓ 29	10/12/2022	5th Last One Standing Ultra Marathon	164,15	×1
✓ 30	3/9/2021	4th Last One Standing Ultra Marathon	164,15	×1
✓ 31	16/10/2020	15th Pony Express Trail 100 Mile	160,93	×1
✓ 32	25/9/2020	22nd The Bear 100 Mile Endurance Run	160,93	×1
✓ 33	27/9/2019	21st The Bear 100 Mile Endurance Run	160,93	×1
✓ 34	11/9/2015	36th Wasatch Front 100 Mile	160,93	×1
✓ 35	5/9/2014	35th Wasatch Front 100 Mile	160,93	×1
✓ 36	6/9/2013	34th Wasatch Front 100 Mile	160,93	×1
✓ 37	23/3/2012	7th Antelope Island Buffalo Run 100 Mile	160,93	×1
✓ 38	9/9/2011	32nd Wasatch Front 100 Mile	160,93	×1
✓ 39	20/8/2011	29th Leadville Trail 100 Mile	160,93	×1
✓ 40	24/9/2010	12th The Bear 100 Mile Endurance Run	160,93	×1
✓ 41	10/9/2010	31st Wasatch Front 100 Mile	160,93	×1
✓ 42	21/8/2010	28th Leadville Trail 100 Mile	160,93	×1
✓ 43	6/9/2008	29th Wasatch Front 100 Mile	160,93	×1
✓ 44	28/9/2007	9th The Bear 100 Mile Endurance Run	160,93	×1
✓ 45	18/8/2007	25th Leadville Trail 100 Mile	160,93	×1
✓ 46	9/9/2006	27th Wasatch Front 100 Mile	160,93	×1
✓ 47	10/9/2005	26th Wasatch Front 100 Mile	160,93	×1
✓ 48	11/9/2004	25th Wasatch Front 100 Mile	160,93	×1
✓ 49	21/8/2004	22nd Leadville Trail 100 Mile	160,93	×1
✓ 50	17/7/2004	16th Vermont 100 Mile Endurance Race	160,93	×1
✓ 51	26/6/2004	31th Western States 100 Mile Endurance Run	160,93	×1
✓ 52	6/9/2003	24th Wasatch Front 100 Mile	160,93	×1
✓ 53	14/2/2020	7th Jackpot Ultra Running Festival 48 Hour Race	160,93	×1
✓ 54	30/5/2026	10th Hotfoot Hamster 24 Hour Run	147,50	×1
✓ 55	22/10/2021	1st Ultimate Unicorn 24 Hour Challenge	128,75	×1
✓ 56	4/9/2020	3rd Last One Standing Ultra Marathon	106,22	×1
✓ 57	9/11/2024	1st Liberty Park Endurance 12h Runs	100,69	—
✓ 58	27/4/2024	3rd Bonneville Backyard Ultra	100,59	—
✓ 59	30/4/2022	1st Bonneville Backyard Ultra	100,59	—
✓ 60	3/8/2019	18th Katcina Mosa 100K Mountain Run	100,00	—
✓ 61	1/8/2015	14th Katcina Mosa 100K Mountain Run	100,00	—
✓ 62	2/8/2014	13th Katcina Mosa 100K Mountain Run	100,00	—
✓ 63	4/4/2014	3rd The Zion 100 km Run	100,00	—
✓ 64	10/8/2013	12th Katcina Mosa 100K Mountain Run	100,00	—
✓ 65	6/8/2005	4th Katcina Mosa 100K Mountain Run	100,00	—
✓ 66	14/10/2022	2nd Ultimate Unicorn 24 Hour Challenge	96,56	—
✓ 67	1/11/2025	2nd Liberty Park Endurance 12h Runs	91,54	—
✓ 68	30/8/2024	5th Dusk to Dawn Relay Race	86,90	—
✓ 69	4/6/2022	6th Jackrabbit Jubilee 12 Hour Run	80,95	—
✓ 70	26/4/2025	4th Bonneville Backyard Ultra	80,47	—
✓ 71	29/5/2021	9th Bryce 50 Mile Trail Run	80,47	—
✓ 72	13/6/2020	24th Snow Peaks 50 Mile Trail Run	80,47	—
✓ 73	23/3/2019	14th Antelope Island Buffalo Run 50 Mile	80,47	—
✓ 74	2/6/2018	22nd Snow Peaks 50 Mile Trail Run	80,47	—
✓ 75	4/6/2016	20th Snow Peaks 50 Mile Trail Run	80,47	—
✓ 76	19/3/2016	11th Antelope Island Buffalo Run 50 Mile	80,47	—
✓ 77	6/6/2015	19th Snow Peaks 50 Mile Trail Run	80,47	—
✓ 78	21/3/2015	10th Antelope Island Buffalo Run 50 Mile	80,47	—
✓ 79	7/6/2014	18th Snow Peaks 50 Mile Trail Run	80,47	—
✓ 80	22/3/2014	9th Antelope Island Buffalo Run 50 Mile	80,47	—
81	23/3/2013	8th Antelope Island Buffalo Run 50 Mile	80,47	—
82	2/6/2012	16th Snow Peaks 50 Mile Trail Run	80,47	—
83	17/7/2011	4th Leadville Silver Rush 50 Mile Run	80,47	—
84	4/6/2011	15th Snow Peaks 50 Mile Trail Run	80,47	—
85	18/7/2010	3rd Leadville Silver Rush 50 Mile Run	80,47	—
86	5/6/2010	14th Snow Peaks 50 Mile Trail Run	80,47	—
87	27/3/2010	5th Antelope Island Buffalo Run 50 Mile	80,47	—
88	28/3/2009	4th Antelope Island Buffalo Run 50 Mile	80,47	—
89	22/3/2008	3rd Antelope Island Buffalo Run 50 Mile	80,47	—
90	5/1/2008	1st Running from an Angel 50 Miler	80,47	—
91	23/6/2007	1st Running With The Devil 50 Mile Race	80,47	—
92	2/6/2007	11th Snow Peaks 50 Mile Trail Run	80,47	—
93	24/3/2007	2nd Antelope Island Buffalo Run 50 Mile	80,47	—
94	3/6/2006	10th Snow Peaks 50 Mile Trail Run	80,47	—
95	4/6/2005	9th Snow Peaks 50 Mile Trail Run	80,47	—
96	5/6/2004	8th Snow Peaks 50 Mile Trail Run	80,47	—
97	7/6/2003	7th Snow Peaks 50 Mile Trail Run	80,47	—
98	11/1/2003	23rd Avalon Benefit 50-Mile Run	80,47	—
99	2/6/2001	5th Snow Peaks 50 Mile Trail Run	80,47	—
100	3/6/2000	4th Snow Peaks 50 Mile Trail Run	80,47	—
101	26/8/2023	7th Jackrabbit Jubilee 12 Hour Run	75,50	—
102	22/8/2026	10th Jackrabbit Jubilee 12 Hour Run	73,00	—
103	3/9/2022	6th Hotfoot Hamster 24 Hour Run	69,52	—
104	29/4/2023	2nd Bonneville Backyard Ultra	67,06	—
105	14/2/2015	9th Moab Red Hot 55k	55,00	—
106	13/2/2010	4th Moab Red Hot 55k	55,00	—
107	14/2/2009	3rd Moab Red Hot 55k	55,00	—
108	16/2/2008	2nd Moab Red Hot 55k	55,00	—
109	25/4/2026	5th Bonneville Backyard Ultra	53,65	—
110	10/8/2019	1st Elephant Rock 50km Trail Run	50,00	—
111	26/1/2019	2nd Arches Ultra 50 km Race	50,00	—
112	17/11/2018	4th Dead Horse 50 km Race	50,00	—
113	24/3/2018	13th Antelope Island Buffalo Run 50 km	50,00	—
114	28/10/2006	2nd Goblin Valley Ultra 50k	50,00	—
115	29/10/2005	1st Goblin Valley Ultra 50k	50,00	—
116	12/12/2025	8th Last One Standing Ultra Marathon	48,28	—