Marissa Walker

Born : 1967 Cat. W55 Ultrarunner since 2002

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

70,0%

Rank quotient ?This runner's calculation uses 88 eligible race(s): Σ(rank − 1) = 7 874; Σ finishers = 11 256. 7 874 / 11 256 × 100 = 69.95%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed88

Km — ultra races6 661 km

> 100 km12

> 160 km12

> 200 km1

Longest race241,4 km

2nd Pigtails Challenge 150 Mile — 24/5/2013

Km per year (ultra races)

643

2022

2023

425

2024

150

2025

2026

Race types (share of distance)

Road9,3%

Trail90,7%

Wins & podiums (ultra)

🏆 Win0

🏆 Win F2

🏅 Top 30

🏅 Top 3 F8

Longest winning streak0

Current streak0

Records

50 km5h43'53 100 km13h50'59 50 mi9h19'08 100 mi24h38'37 6 h49,61 km 12 h92,70 km

HISTORY

88 race(s)

Date		Race	Perf.	Rk
2026
21.03	50km	15th Redwood (Spring) 50 km Trail Run	8:32:20 h	39
2025
20.09	100km	7th The Cascade Super 100km Ultra Race	16:08:50 h	22
12.07	50km	27th Siskiyou Out Back 50 km Trail Run	9:06:14 h	177
2024
19.10	100mi	14th Pumpkin Holler 100 Mile Race	28:53:44 h	28
07.09	12h	9th Mendocino Running Festival 12 Hours	64.373 km	9
10.08	50km	15th Redwood Summer Trail Run	8:25:59 h	22
15.06	6h	3rd SF Half Day 6h	49.608 km	13
13.04	50km	10th SPASM Lake Chabot 50 km	7:48:24 h	12
09.03	50km	12th Marin Ultra Challenge 50 km Race	7:59:57 h	215
2023
20.05	50km	10th San Francisco 50 km Endurance Run	8:27:58 h	41
2022
03.12	50km	13th McDowell Mountain Frenzy 50 km	7:25:36 h	98
05.11	50km	11th Lake Chabot 50 km Trail Run	6:36:40 h	23
01.10	100mi	8th The Hennepin Hundred - 100 Mile Run	25:31:58 h	102
09.07	12h	1st SF Half Day 12h	90.927 km	4
09.04	100mi	11th The Zion 100 Mile Run	34:55:03 h	118
12.03	50km	10th Marin Ultra Challenge 50 km Race	6:54:35 h	146
05.02	50mi	10th Elephant Mountain 50 Mile	13:34:08 h	23
2021
31.12	6h	11th New Years One Day 6 Hour Run	47.958 km	17
18.12	50km	10th Woodside Ramble 50K - Winter	6:38:28 h	68
13.11	50mi	6th Valley of Fire Backcountry 50 Mile Trailrace	11:58:50 h	7
04.09	50km	14th Three Corner Rock PCT (Bunker to Bonneville)	7:56:53 h	42
01.08	50km	40th Skyline 50k Endurance Run	6:45:36 h	99
10.07	50km	11th Golden Gate 50 km Summer Trail Run	6:58:25 h	42
2020
18.01	46.5mi	8th San Diego 50 Mile Trail	11:39:38 h	124
2019
14.12	50km	2nd Snowberry Creek Trail Race	6:26:21 h	17
21.09	50km	9th Coastal 50 km Trail Run	11:01:30 h	69
24.08	31.5mi	20th Tamalpa Headlands 50K	7:50:36 h	102
04.08	50km	9th Crystal Springs 50 km Summer Trail Run	7:27:27 h	24
06.07	6h	10th Dirty Dozen 6h Endurance Run	48.795 km	32
2018
29.09	50km	5th Overlook Endurance Run 50K	8:42:49 h	89
21.04	50km	3rd Mendocino Coast 50K Ultra Trail Run	8:06:41 h	102
2017
06.08	51km	9th E.T. Full Moon Midnight Ultra Marathon	7:18:32 h	26
2016
29.10	100km	14th Javelina Jundred 100 km Endurance Run	19:34:17 h	97
22.05	50km	29th Ohlone 50K Wilderness Run	9:06:35 h	120
13.02	60km	3rd Black Canyon Trail 60 km Run	9:49:58 h	51
2015
31.12	12h	6th New Years One Day 12 Hour Run	77.127 km	21
11.04	50mi	7th Lake Sonoma 50 Mile Race	13:02:00 h	263
29.03	50km	5th Gorge Waterfalls 50k	8:05:50 h	240
31.01	100mi	23rd Rocky Raccoon 100 Mile Trail Run	27:52:08 h	183
2014
17.10	100mi	9th Pony Express Trail 100 Mile	27:08:22 h	22
16.08	50km	4th Run-de-Vous 50 km Endurance Run	6:05:14 h	4
21.06	50km	1st Mary's Peak 50k Ultra Trail Race	7:42:42 h	33
10.05	50km	19th McDonald Forest 50K Trail Run	7:19:05 h	207
25.01	100mi	4th Coldwater Rumble 100 Mile Race	30:43:31 h	45
2013
12.10	100km	2nd Cuyamaca 100 km Endurance Run	17:32:10 h	80
21.09	50km	3rd Coastal 50 km Trail Run	7:10:09 h	62
24.05	150mi	2nd Pigtails Challenge 150 Mile	2d 03:31:00 h	7
13.04	50mi	5th Lake Sonoma 50 Mile Race	12:03:34 h	220
09.03	50km	24th Way Too Cool 50K Endurance Run	6:27:25 h	597
24.02	50mi	1st San Bruno Mountain 50 Mile Ultramarathon	11:37:56 h	16
2012
06.10	100mi	12th Rio Del Lago 100 Mile	33:10:40 h	49
08.09	50km	11th Stevens Creek Striders 50K	8:28:38 h	45
12.08	50km	31st Skyline 50k Endurance Run	6:49:28 h	156
30.06	50km	3rd Vashon Ultramarathon 50k	6:40:47 h	36
19.05	100mi	5th Keys100 Ultra-Marathons 100mi	24:38:37 h	34
14.04	50mi	4th Lake Sonoma 50 Mile Race	12:24:27 h	195
10.03	50km	23rd Way Too Cool 50K Endurance Run	7:11:05 h	626
04.02	50km	34th Jed Smith Ultra Classic - 50 km Race	5:54:39 h	56
2011
24.09	50km	1st Coastal 50 km Trail Run	7:33:36 h	54
07.05	100km	16th Miwok 100k Trail race	14:43:13 h	229
12.03	50km	22nd Way Too Cool 50K Endurance Run	6:38:43 h	387
2010
30.10	100mi	4th Cactus Rose 100 Mile	33:59:11 h	28
02.10	50km	2nd Gold Country	7:52:21 h	6
24.07	50mi	12th Mt. Hood 50 Mile Trail Run	11:14:21 h	75
2009
31.10	50km	14th Helen Klein Ultra Classic 50km	5:51:28 h	28
27.06	100mi	36th Western States 100 Mile Endurance Run	29:38:13 h	219
06.06	50km	9th Mount Diablo 50K	8:04:47 h	57
02.05	100km	14th Miwok 100k Trail race	13:50:59 h	170
2008
15.11	100mi	6th Javelina Jundred 100 Mile Endurance Run	26:28:11 h	45
25.10	12h	3rd San Francisco One Day, 12h	92.698 km	14
11.10	50mi	26th Dick Collins Firetrails 50 Mile	10:17:30 h	86
20.09	50km	1st Skyline to the Sea 50km	6:20:08 h	95
10.05	50mi	25th Quicksilver 50 Mile Endurance Run	11:10:57 h	59
2007
13.10	50mi	25th Dick Collins Firetrails 50 Mile	10:21:21 h	112
08.09	50km	6th Stevens Creek Striders 50K	6:26:08 h	17
21.07	50mi	6th Tahoe Rim Trail 50M Endurance Runs	13:23:12 h	82
02.06	50km	7th Mount Diablo 50K	7:50:30 h	25
05.05	100km	12th Miwok 100k Trail race	14:45:59 h	164
14.04	50mi	28th American River 50 Mile Endurance Run	9:57:01 h	241
17.02	50km	3rd Sequoia Trail Run	6:53:41 h	38
03.02	50km	6th Woodside Trail Run 50K	5:54:00 h	43
2006
16.12	50km	Muir Beach Trail Run	6:37:51 h	20
25.11	28mi	22nd Quad Dipsea Trail Run	6:18:51 h	114
11.11	50km	4th Stinson Beach 50 km	6:38:51 h	12
07.10	50mi	24th Dick Collins Firetrails 50 Mile	9:19:08 h	39
27.08	50km	1st Redwood Park 50K Trail Run	5:46:18 h	9
06.08	50km	25th Skyline 50k Endurance Run	5:43:53 h	49
2002
01.09	50km	8th Run On The Sly 50 km	6:13:30 h	28

Filter

Runner	Races in common

DUV-index calculation details

#	Date	Race	Credited km	DUV-index+
✓ 1	24/5/2013	2nd Pigtails Challenge 150 Mile	241,40	×4
✓ 2	19/10/2024	14th Pumpkin Holler 100 Mile Race	160,93	×3
✓ 3	1/10/2022	8th The Hennepin Hundred - 100 Mile Run	160,93	×3
✓ 4	9/4/2022	11th The Zion 100 Mile Run	160,93	×3
✓ 5	31/1/2015	23rd Rocky Raccoon 100 Mile Trail Run	160,93	×3
✓ 6	17/10/2014	9th Pony Express Trail 100 Mile	160,93	×3
✓ 7	25/1/2014	4th Coldwater Rumble 100 Mile Race	160,93	×3
✓ 8	6/10/2012	12th Rio Del Lago 100 Mile	160,93	×3
✓ 9	19/5/2012	5th Keys100 Ultra-Marathons 100mi	160,93	×3
✓ 10	30/10/2010	4th Cactus Rose 100 Mile	160,93	×3
✓ 11	27/6/2009	36th Western States 100 Mile Endurance Run	160,93	×3
✓ 12	15/11/2008	6th Javelina Jundred 100 Mile Endurance Run	160,93	×3
✓ 13	20/9/2025	7th The Cascade Super 100km Ultra Race	100,00	×1
✓ 14	29/10/2016	14th Javelina Jundred 100 km Endurance Run	100,00	×1
✓ 15	12/10/2013	2nd Cuyamaca 100 km Endurance Run	100,00	×1
✓ 16	7/5/2011	16th Miwok 100k Trail race	100,00	×1
✓ 17	2/5/2009	14th Miwok 100k Trail race	100,00	×1
✓ 18	5/5/2007	12th Miwok 100k Trail race	100,00	×1
✓ 19	25/10/2008	3rd San Francisco One Day, 12h	92,70	×1
✓ 20	9/7/2022	1st SF Half Day 12h	90,93	×1
✓ 21	5/2/2022	10th Elephant Mountain 50 Mile	80,47	×1
✓ 22	13/11/2021	6th Valley of Fire Backcountry 50 Mile Trailrace	80,47	×1
✓ 23	11/4/2015	7th Lake Sonoma 50 Mile Race	80,47	×1
✓ 24	13/4/2013	5th Lake Sonoma 50 Mile Race	80,47	×1
✓ 25	24/2/2013	1st San Bruno Mountain 50 Mile Ultramarathon	80,47	×1
✓ 26	14/4/2012	4th Lake Sonoma 50 Mile Race	80,47	×1
✓ 27	24/7/2010	12th Mt. Hood 50 Mile Trail Run	80,47	×1
✓ 28	11/10/2008	26th Dick Collins Firetrails 50 Mile	80,47	×1
✓ 29	10/5/2008	25th Quicksilver 50 Mile Endurance Run	80,47	×1
✓ 30	13/10/2007	25th Dick Collins Firetrails 50 Mile	80,47	×1
✓ 31	21/7/2007	6th Tahoe Rim Trail 50M Endurance Runs	80,47	×1
✓ 32	14/4/2007	28th American River 50 Mile Endurance Run	80,47	×1
✓ 33	7/10/2006	24th Dick Collins Firetrails 50 Mile	80,47	×1
✓ 34	31/12/2015	6th New Years One Day 12 Hour Run	77,13	×1
✓ 35	18/1/2020	8th San Diego 50 Mile Trail	74,83	×1
✓ 36	7/9/2024	9th Mendocino Running Festival 12 Hours	64,37	×1
✓ 37	13/2/2016	3rd Black Canyon Trail 60 km Run	60,00	×1
✓ 38	6/8/2017	9th E.T. Full Moon Midnight Ultra Marathon	51,00	—
✓ 39	24/8/2019	20th Tamalpa Headlands 50K	50,69	—
✓ 40	21/3/2026	15th Redwood (Spring) 50 km Trail Run	50,00	—
✓ 41	12/7/2025	27th Siskiyou Out Back 50 km Trail Run	50,00	—
✓ 42	10/8/2024	15th Redwood Summer Trail Run	50,00	—
✓ 43	13/4/2024	10th SPASM Lake Chabot 50 km	50,00	—
✓ 44	9/3/2024	12th Marin Ultra Challenge 50 km Race	50,00	—
✓ 45	20/5/2023	10th San Francisco 50 km Endurance Run	50,00	—
✓ 46	3/12/2022	13th McDowell Mountain Frenzy 50 km	50,00	—
✓ 47	5/11/2022	11th Lake Chabot 50 km Trail Run	50,00	—
✓ 48	12/3/2022	10th Marin Ultra Challenge 50 km Race	50,00	—
✓ 49	18/12/2021	10th Woodside Ramble 50K - Winter	50,00	—
✓ 50	4/9/2021	14th Three Corner Rock PCT (Bunker to Bonneville)	50,00	—
51	1/8/2021	40th Skyline 50k Endurance Run	50,00	—
52	10/7/2021	11th Golden Gate 50 km Summer Trail Run	50,00	—
53	14/12/2019	2nd Snowberry Creek Trail Race	50,00	—
54	21/9/2019	9th Coastal 50 km Trail Run	50,00	—
55	4/8/2019	9th Crystal Springs 50 km Summer Trail Run	50,00	—
56	29/9/2018	5th Overlook Endurance Run 50K	50,00	—
57	21/4/2018	3rd Mendocino Coast 50K Ultra Trail Run	50,00	—
58	22/5/2016	29th Ohlone 50K Wilderness Run	50,00	—
59	29/3/2015	5th Gorge Waterfalls 50k	50,00	—
60	16/8/2014	4th Run-de-Vous 50 km Endurance Run	50,00	—
61	21/6/2014	1st Mary's Peak 50k Ultra Trail Race	50,00	—
62	10/5/2014	19th McDonald Forest 50K Trail Run	50,00	—
63	21/9/2013	3rd Coastal 50 km Trail Run	50,00	—
64	9/3/2013	24th Way Too Cool 50K Endurance Run	50,00	—
65	8/9/2012	11th Stevens Creek Striders 50K	50,00	—
66	12/8/2012	31st Skyline 50k Endurance Run	50,00	—
67	30/6/2012	3rd Vashon Ultramarathon 50k	50,00	—
68	10/3/2012	23rd Way Too Cool 50K Endurance Run	50,00	—
69	4/2/2012	34th Jed Smith Ultra Classic - 50 km Race	50,00	—
70	24/9/2011	1st Coastal 50 km Trail Run	50,00	—
71	12/3/2011	22nd Way Too Cool 50K Endurance Run	50,00	—
72	2/10/2010	2nd Gold Country	50,00	—
73	31/10/2009	14th Helen Klein Ultra Classic 50km	50,00	—
74	6/6/2009	9th Mount Diablo 50K	50,00	—
75	20/9/2008	1st Skyline to the Sea 50km	50,00	—
76	8/9/2007	6th Stevens Creek Striders 50K	50,00	—
77	2/6/2007	7th Mount Diablo 50K	50,00	—
78	17/2/2007	3rd Sequoia Trail Run	50,00	—
79	3/2/2007	6th Woodside Trail Run 50K	50,00	—
80	16/12/2006	Muir Beach Trail Run	50,00	—
81	11/11/2006	4th Stinson Beach 50 km	50,00	—
82	27/8/2006	1st Redwood Park 50K Trail Run	50,00	—
83	6/8/2006	25th Skyline 50k Endurance Run	50,00	—
84	1/9/2002	8th Run On The Sly 50 km	50,00	—
85	15/6/2024	3rd SF Half Day 6h	49,61	—
86	6/7/2019	10th Dirty Dozen 6h Endurance Run	48,80	—
87	31/12/2021	11th New Years One Day 6 Hour Run	47,96	—
88	25/11/2006	22nd Quad Dipsea Trail Run	45,06	—