Laura Spain

Born : 1967 Cat. W55 Ultrarunner since 2004

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

68,4%

Rank quotient ?This runner's calculation uses 78 eligible race(s): Σ(rank − 1) = 9 460; Σ finishers = 13 828. 9 460 / 13 828 × 100 = 68.41%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed78

Km — ultra races5 315 km

> 100 km4

> 160 km4

Longest race160,9 km

18th Tahoe Rim Trail 100M Endurance Run — 20/7/2019

Km per year (ultra races)

2022

195

2023

130

2024

126

2025

100

2026

Race types (share of distance)

Trail100,0%

Wins & podiums (ultra)

🏆 Win0

🏆 Win F0

🏅 Top 30

🏅 Top 3 F2

Longest winning streak0

Current streak0

Records

50 km5h58'55 100 km14h09'06 50 mi10h20'29 100 mi28h33'45

HISTORY

78 race(s)

Date		Race	Perf.	Rk
2026
15.08	50km	17th Redwood Summer Trail Run	7:53:09 h	31
25.04	50km	13th The Canyons Endurance 50 km Run	8:33:22 h	521
2025
29.11	28.4mi	40th Quad Dipsea Trail Run	8:22:50 h	239
27.09	50mi	43rd Dick Collins Firetrails 50 Mile	14:04:54 h	73
2024
04.08	50km	43rd Skyline 50k Endurance Run	7:53:15 h	125
20.07	50mi	23th Tahoe Rim Trail 50M Endurance Run	22:33:49 h	126
2023
25.11	28mi	38th Quad Dipsea Trail Run	8:30:53 h	315
06.08	50km	42nd Skyline 50k Endurance Run	7:53:13 h	94
20.05	50km	38th Silver State 50 km	9:14:46 h	81
01.04	50km	12th Redwood (Spring) 50 km Trail Run	7:31:39 h	23
2019
20.07	100mi	18th Tahoe Rim Trail 100M Endurance Run	33:55:51 h	134
22.06	52km	4th The Broken Arrow Skyrace	9:52:25 h	320
01.06	50mi	23rd Bishop High Sierra Ultramarathons 50 Miles	13:58:52 h	25
18.05	50km	34th Silver State 50 km	7:55:53 h	63
13.04	50km	11th Diablo Trails Challenge	8:21:52 h	85
2018
24.11	28mi	34th Quad Dipsea Trail Run	7:41:23 h	194
03.11	100mi	18th Rio Del Lago 100 Mile Endurance Run	28:33:45 h	163
06.10	50mi	36th Dick Collins Firetrails 50 Mile	11:10:01 h	36
18.08	100km	4th Castle Peak 100	20:25:47 h	90
02.06	50mi	22nd Bishop High Sierra Ultramarathons 50 Miles	13:26:56 h	29
19.05	50km	33rd Silver State 50 km	7:31:28 h	55
2017
25.11	28mi	33rd Quad Dipsea Trail Run	7:32:16 h	199
15.07	50mi	16th Tahoe Rim Trail 50M Endurance Run	13:10:29 h	68
21.05	50km	30th Ohlone 50K Wilderness Run	8:45:27 h	76
15.04	50km	9th Diablo Trails Challenge	7:56:51 h	67
2016
27.08	100km	2nd Castle Peak 100	19:28:55 h	64
07.08	50km	35th Skyline 50k Endurance Run	6:28:55 h	90
16.07	50mi	15th Tahoe Rim Trail 50M Endurance Run	13:19:16 h	61
14.05	50km	33rd Quicksilver 50 km Endurance Run	7:14:17 h	65
17.04	50km	8th Diablo Trails Challenge	8:33:07 h	109
12.03	50km	5th Marin Ultra Challenge 50 km Race	6:02:46 h	89
2015
28.11	28mi	31st Quad Dipsea Trail Run	7:09:49 h	194
10.07	100km	5th Santa Barbara 100 km Endurance Race	19:58:08 h	16
11.04	50mi	7th Lake Sonoma 50 Mile Race	12:00:00 h	223
2014
19.07	50km	13th Tahoe Rim Trail 50km Endurance Run	8:47:53 h	64
20.06	100mi	Bighorn Mountain Wild & Scenic 100 Mile Trail Run	33:34:48 h	139
10.05	100km	31st Quicksilver 100 km Endurance Run	15:53:16 h	65
19.04	50km	6th Diablo Trails Challenge	7:00:40 h	71
12.04	50mi	6th Lake Sonoma 50 Mile Race	12:31:30 h	262
2013
30.11	28mi	29th Quad Dipsea Trail Run	6:58:58 h	160
20.07	100mi	12th Tahoe Rim Trail 100M Endurance Run	31:36:20 h	84
18.05	50km	28th Silver State 50 km	6:27:50 h	40
04.05	60km	18th Miwok 60k Trail race	7:54:17 h	169
13.04	50mi	5th Lake Sonoma 50 Mile Race	11:52:57 h	209
24.03	50km	3rd Canyon Meadow (Winter) 50 km Trail Run	6:15:10 h	50
2012
24.11	28mi	28th Quad Dipsea Trail Run	7:02:48 h	112
21.07	50mi	11th Tahoe Rim Trail 50M Endurance Run	13:37:02 h	91
19.05	50km	27th Silver State 50 km	7:57:22 h	56
05.05	100km	17th Miwok 100k Trail race	16:07:06 h	221
14.04	50mi	4th Lake Sonoma 50 Mile Race	12:52:07 h	207
2011
26.11	28mi	27th Quad Dipsea Trail Run	7:08:58 h	162
08.10	50mi	29th Dick Collins Firetrails 50 Mile	11:59:48 h	167
16.07	50mi	10th Tahoe Rim Trail 50M Endurance Run	13:18:05 h	83
07.05	100km	16th Miwok 100k Trail race	14:22:32 h	220
19.03	50km	3rd Diablo Trails Challenge	8:26:24 h	43
2010
17.07	50km	9th Tahoe Rim Trail 50km Endurance Runs	7:39:39 h	45
15.05	50km	25th Silver State 50 km	7:27:01 h	57
01.05	100km	15th Miwok 100k Trail race	14:09:06 h	199
2009
28.11	28mi	25th Quad Dipsea Trail Run	6:50:52 h	128
10.10	50mi	27th Dick Collins Firetrails 50 Mile	10:20:29 h	138
12.09	36.4mi	5th Lake of the Sky 32 Mile	8:16:03 h	26
18.07	50mi	8th Tahoe Rim Trail 50M Endurance Runs	13:03:50 h	56
22.03	50km	1st Diablo Trails Challenge	8:09:07 h	31
2008
03.08	50km	27th Skyline 50k Endurance Run	6:01:53 h	71
19.07	50mi	7th Tahoe Rim Trail 50M Endurance Runs	14:00:51 h	87
08.06	50km	8th Mount Diablo 50K	8:45:22 h	57
03.05	100km	13th Miwok 100k Trail race	14:15:26 h	211
12.04	50mi	1st Lake Sonoma 50 Mile Race	13:07:53 h	57
08.03	50km	19th Way Too Cool 50K Endurance Run	6:13:00 h	278
2007
24.11	28mi	23rd Quad Dipsea Trail Run	6:53:43 h	162
13.10	50mi	25th Dick Collins Firetrails 50 Mile	11:20:33 h	172
21.07	50km	6th Tahoe Rim Trail 50km Endurance Runs	7:25:30 h	52
2006
25.11	28mi	22nd Quad Dipsea Trail Run	6:52:34 h	158
2005
07.05	50mi	22nd Quicksilver 50 Mile Endurance Run	11:10:36 h	67
12.03	50km	16th Way Too Cool 50K Endurance Run	5:58:55 h	215
05.02	50km	4th Woodside Trail Run 50K	6:09:30 h	41
2004
27.11	28mi	20th Quad Dipsea Trail Run	6:41:39 h	124
13.03	50km	15th Way Too Cool 50K Endurance Run	6:13:03 h	288

Filter

Runner	Races in common

DUV-index calculation details

#	Date	Race	Credited km	DUV-index+
✓ 1	20/7/2019	18th Tahoe Rim Trail 100M Endurance Run	160,93	×3
✓ 2	3/11/2018	18th Rio Del Lago 100 Mile Endurance Run	160,93	×3
✓ 3	20/6/2014	Bighorn Mountain Wild & Scenic 100 Mile Trail Run	160,93	×3
✓ 4	20/7/2013	12th Tahoe Rim Trail 100M Endurance Run	160,93	×3
✓ 5	18/8/2018	4th Castle Peak 100	100,00	×2
✓ 6	27/8/2016	2nd Castle Peak 100	100,00	×2
✓ 7	10/7/2015	5th Santa Barbara 100 km Endurance Race	100,00	×2
✓ 8	10/5/2014	31st Quicksilver 100 km Endurance Run	100,00	×2
✓ 9	5/5/2012	17th Miwok 100k Trail race	100,00	×2
✓ 10	7/5/2011	16th Miwok 100k Trail race	100,00	×2
✓ 11	1/5/2010	15th Miwok 100k Trail race	100,00	×2
✓ 12	3/5/2008	13th Miwok 100k Trail race	100,00	×2
✓ 13	27/9/2025	43rd Dick Collins Firetrails 50 Mile	80,47	×1
✓ 14	20/7/2024	23th Tahoe Rim Trail 50M Endurance Run	80,47	×1
✓ 15	1/6/2019	23rd Bishop High Sierra Ultramarathons 50 Miles	80,47	×1
✓ 16	6/10/2018	36th Dick Collins Firetrails 50 Mile	80,47	×1
✓ 17	2/6/2018	22nd Bishop High Sierra Ultramarathons 50 Miles	80,47	×1
✓ 18	15/7/2017	16th Tahoe Rim Trail 50M Endurance Run	80,47	×1
✓ 19	16/7/2016	15th Tahoe Rim Trail 50M Endurance Run	80,47	×1
✓ 20	11/4/2015	7th Lake Sonoma 50 Mile Race	80,47	×1
✓ 21	12/4/2014	6th Lake Sonoma 50 Mile Race	80,47	×1
✓ 22	13/4/2013	5th Lake Sonoma 50 Mile Race	80,47	×1
✓ 23	21/7/2012	11th Tahoe Rim Trail 50M Endurance Run	80,47	×1
✓ 24	14/4/2012	4th Lake Sonoma 50 Mile Race	80,47	×1
✓ 25	8/10/2011	29th Dick Collins Firetrails 50 Mile	80,47	×1
✓ 26	16/7/2011	10th Tahoe Rim Trail 50M Endurance Run	80,47	×1
✓ 27	10/10/2009	27th Dick Collins Firetrails 50 Mile	80,47	×1
✓ 28	18/7/2009	8th Tahoe Rim Trail 50M Endurance Runs	80,47	×1
✓ 29	19/7/2008	7th Tahoe Rim Trail 50M Endurance Runs	80,47	×1
✓ 30	12/4/2008	1st Lake Sonoma 50 Mile Race	80,47	×1
✓ 31	13/10/2007	25th Dick Collins Firetrails 50 Mile	80,47	×1
✓ 32	7/5/2005	22nd Quicksilver 50 Mile Endurance Run	80,47	×1
✓ 33	4/5/2013	18th Miwok 60k Trail race	60,00	×1
✓ 34	12/9/2009	5th Lake of the Sky 32 Mile	58,58	×1
✓ 35	22/6/2019	4th The Broken Arrow Skyrace	52,00	×1
✓ 36	15/8/2026	17th Redwood Summer Trail Run	50,00	×1
✓ 37	25/4/2026	13th The Canyons Endurance 50 km Run	50,00	×1
✓ 38	4/8/2024	43rd Skyline 50k Endurance Run	50,00	×1
✓ 39	6/8/2023	42nd Skyline 50k Endurance Run	50,00	×1
✓ 40	20/5/2023	38th Silver State 50 km	50,00	×1
✓ 41	1/4/2023	12th Redwood (Spring) 50 km Trail Run	50,00	×1
✓ 42	18/5/2019	34th Silver State 50 km	50,00	×1
✓ 43	13/4/2019	11th Diablo Trails Challenge	50,00	×1
✓ 44	19/5/2018	33rd Silver State 50 km	50,00	×1
✓ 45	21/5/2017	30th Ohlone 50K Wilderness Run	50,00	×1
✓ 46	15/4/2017	9th Diablo Trails Challenge	50,00	×1
✓ 47	7/8/2016	35th Skyline 50k Endurance Run	50,00	×1
✓ 48	14/5/2016	33rd Quicksilver 50 km Endurance Run	50,00	×1
✓ 49	17/4/2016	8th Diablo Trails Challenge	50,00	×1
✓ 50	12/3/2016	5th Marin Ultra Challenge 50 km Race	50,00	×1
51	19/7/2014	13th Tahoe Rim Trail 50km Endurance Run	50,00	×1
52	19/4/2014	6th Diablo Trails Challenge	50,00	×1
53	18/5/2013	28th Silver State 50 km	50,00	×1
54	24/3/2013	3rd Canyon Meadow (Winter) 50 km Trail Run	50,00	×1
55	19/5/2012	27th Silver State 50 km	50,00	×1
56	19/3/2011	3rd Diablo Trails Challenge	50,00	×1
57	17/7/2010	9th Tahoe Rim Trail 50km Endurance Runs	50,00	×1
58	15/5/2010	25th Silver State 50 km	50,00	×1
59	22/3/2009	1st Diablo Trails Challenge	50,00	×1
60	3/8/2008	27th Skyline 50k Endurance Run	50,00	×1
61	8/6/2008	8th Mount Diablo 50K	50,00	×1
62	8/3/2008	19th Way Too Cool 50K Endurance Run	50,00	×1
63	21/7/2007	6th Tahoe Rim Trail 50km Endurance Runs	50,00	×1
64	12/3/2005	16th Way Too Cool 50K Endurance Run	50,00	×1
65	5/2/2005	4th Woodside Trail Run 50K	50,00	×1
66	13/3/2004	15th Way Too Cool 50K Endurance Run	50,00	×1
67	29/11/2025	40th Quad Dipsea Trail Run	45,71	—
68	25/11/2023	38th Quad Dipsea Trail Run	45,06	—
69	24/11/2018	34th Quad Dipsea Trail Run	45,06	—
70	25/11/2017	33rd Quad Dipsea Trail Run	45,06	—
71	28/11/2015	31st Quad Dipsea Trail Run	45,06	—
72	30/11/2013	29th Quad Dipsea Trail Run	45,06	—
73	24/11/2012	28th Quad Dipsea Trail Run	45,06	—
74	26/11/2011	27th Quad Dipsea Trail Run	45,06	—
75	28/11/2009	25th Quad Dipsea Trail Run	45,06	—
76	24/11/2007	23rd Quad Dipsea Trail Run	45,06	—
77	25/11/2006	22nd Quad Dipsea Trail Run	45,06	—
78	27/11/2004	20th Quad Dipsea Trail Run	45,06	—