James Mercer

Born : 1969 Cat. M55 Ultrarunner since 1998

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

32,8%

Rank quotient ?This runner's calculation uses 130 eligible race(s): Σ(rank − 1) = 3 510; Σ finishers = 10 703. 3 510 / 10 703 × 100 = 32.79%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed130

Km — ultra races10 386 km

> 100 km24

> 160 km23

> 24h5

Longest race180,6 km

3rd Hallucination 24 Hour Trail Run — 3/2/2018

Km per year (ultra races)

396

2022

592

2023

283

2024

231

2025

2026

Race types (share of distance)

Road16,4%

Trail82,5%

Elim.0,6%

Ult.Walk0,5%

Wins & podiums (ultra)

🏆 Win1

🏆 Win M1

🏅 Top 33

🏅 Top 3 M5

Longest winning streak1

Current streak0

Records

50 km4h39'05 100 km12h36'21 50 mi7h09'05 100 mi20h46'42 6 h51,66 km 12 h96,64 km 24 h180,57 km Backyard10 loops

HISTORY

130 race(s)

Date		Race	Perf.	Rk
2025
22.11	50mi	4th Fall Creek 50	7:09:05 h	20
11.10	12h	7th Arrowhead 12 Hour Endurance Run	50.082 km	20
04.10	50km	11th The Hennepin Hundred - 50 km Run	6:26:15 h	30
23.08	50km	9th Shawnee Hills 100 - 50 km	8:59:57 h	39
2024
20.07	6h	9th Get Your Butt Kicked 6 Hour Race	45.608 km	41
25.05	6h	19th Hawthorn Half Day 6 Hour Run	51.659 km	7
27.04	50mi	16th Frisco Railroad 50 Mile Run	10:06:30 h	11
02.03	50km	8th Ozark Highlands Endurance Run	6:35:26 h	14
03.02	9h	7th Beulah Challenge 9 Hour Race	55.361 km	17
2023
02.12	50km	10th Jackson County 50-50 Ultramarathon - 50 km	6:17:13 h	21
11.11	50mi	10th Tunnel Hill 50 Mile Race	9:41:01 h	95
21.10	50km	6th Big Hill Pond Walking Tall	6:33:16 h	19
16.09	53km	9th Rockin Rockwoods Trail Race	7:02:49 h	13
12.08	8h	33rd Howl at the Moon 8 Hour Run	63.569 km	7
15.07	6h	8th Get Your Butt Kicked 6 Hour Race	48.439 km	31
25.03	30mi	17th Clinton Lake Ultra	6:03:52 h	14
24.02	100km	10th Lake Ouachita Vista Trail Endurance 100 km Run (LOViT)	14:09:56 h	21
04.02	9h	6th Beulah Challenge 9 Hour Race	48.441 km	13
14.01	50km	18th Swamp Stomper 50K	6:54:20 h	18
2022
13.05	106mi	10th Cruel Jewel 100 Mile	34:12:14 h	35
09.04	100mi	22nd Potawatomi 100 Mile Trail Run	25:24:32 h	5
15.01	40mi	4th Fierce Dragon Flintstrike 40	11:49:00 h	2 🥈
2021
30.10	100mi	13th Ozark Trail 100 Mile Endurance Run	25:39:38 h	7
02.10	100mi	31st Arkansas Traveller 100	25:48:58 h	31
10.09	100mi	31th Superior Fall Trail Races 100 Mile	29:35:34 h	28
24.07	100mi	15th Burning River 100 Mile Endurance Run	23:36:39 h	34
05.06	100km	6th Eagle Up Ultra 100 km	12:36:21 h	5
05.03	Backyard Ultra	1st Queeny Backyard Ultra	67.060 km (10h)	25
2020
07.11	100mi	12th Ozark Trail 100 Mile Endurance Run	25:30:40 h	7
01.02	100mi	28th Rocky Raccoon 100 Mile Trail Run	25:00:02 h	101
2019
02.11	100mi	11th Ozark Trail 100 Mile Endurance Run	27:20:04 h	17
05.10	100mi	29th Arkansas Traveller 100	25:23:38 h	41
24.08	50km	3rd Shawnee Hills 100 - 50 km	6:36:15 h	6
2018
03.11	100mi	10th Ozark Trail 100 Mile Endurance Run	25:30:13 h	12
28.07	102mi	12th Burning River 100 Mile Endurance Run	24:45:36 h	53
15.06	100mi	26th Bighorn Mountain Wild & Scenic 100 Mile Trail Run	32:25:15 h	118
12.05	50mi	2nd Dark Sky 50	10:44:00 h	7
21.04	50km	7th Cedro Peak 50 km Ultramarathon	6:16:56 h	28
03.02	24h	3rd Hallucination 24 Hour Trail Run	180.568 km	1 🏆
06.01	50mi	5th Wild Azalea Trail Challenge	9:50:28 h	6
2017
07.10	100mi	27th Arkansas Traveller 100	20:54:56 h	8
16.09	50km	4th The Barkley Fall Classic	10:25:01 h	8
19.05	106mi	5th Cruel Jewel 100 Mile	33:14:28 h	13
08.04	50km	3rd Ozarks Foothills 50K	5:30:56 h	8
11.03	50mi	14th Land Between The Lakes 50 Mile Trail Run	8:48:39 h	11
28.01	50km	23rd Mountain Mist 50k	5:32:39 h	43
2016
17.12	50mi	9th Lookout Mountain 50 Mile Race	9:27:34 h	22
05.11	100mi	8th Ozark Trail 100 Mile Endurance Run	25:50:29 h	14
01.10	100mi	26th Arkansas Traveller 100	21:16:42 h	11
17.09	50km	3rd The Barkley Fall Classic	10:34:13 h	24
18.06	12h	4th Dizzy GOAT 12 Hour Trail Run	91.732 km	6
16.04	50km	18th Double Chubb 50k	4:51:29 h	6
09.04	50km	2nd Ozarks Foothills 50K	5:34:22 h	11
13.02	50mi	35th Cross Timbers Trail Run	10:58:59 h	3 🥉
23.01	50km	22nd Mountain Mist 50k	6:19:36 h	59
2015
14.11	100mi	2nd Tunnel Hill 100 Mile Race	21:23:53 h	18
10.10	53km	1st Rockin Rockwoods Trail Race	6:24:49 h	6
03.10	50km	5th Rock Bridge Revenge 50 km Race	5:14:04 h	4
19.09	50km	2nd The Barkley Fall Classic	10:54:49 h	26
16.05	50mi	16th Berryman 50 Mile	10:14:04 h	11
18.04	50mi	25th Ouachita Trail 50 Mile	10:35:30 h	9
14.03	50mi	12th Land Between The Lakes 50 Mile Trail Run	9:24:42 h	23
24.01	50km	21st Mountain Mist 50k	5:55:06 h	80
10.01	50mi	1st Cloudland Canyon 50 Mile Race	11:20:26 h	29
2014
01.11	50mi	32nd Mountain Masochist 50 Mile Trail Run	10:49:04 h	122
04.10	50km	4th Rock Bridge Revenge 50 km Race	5:50:30 h	10
12.07	50km	23th Full Moon Run - Midnight 50K	6:10:37 h	25
25.01	50km	20th Mountain Mist 50k	6:58:05 h	183
2012
21.04	50km	14th Double Chubb 50k	5:23:05 h	22
16.03	12h	3rd Howard Aslinger 12 Hour Endurance Run	68.091 km	19
2011
22.01	50km	17th Mountain Mist 50k	6:15:36 h	96
2010
16.10	50km	2nd Cumberland Trail 50k	6:15:00 h	11
25.09	50km	16th Flatrock 50K	6:37:54 h	16
12.06	10h	4th Run Under The Stars - Paducah	51.499 km	39
2009
06.12	40mi	20th Pine Mountain 40 Miles	8:10:57 h	30
29.09	50km	15th Flatrock 50K	6:50:53 h	12
11.07	50km	3rd Psycho Psummer Run Toto Run 50K	7:50:29 h	42
06.06	100mi	14th Kettle Moraine 100 Mile Endurance Run	24:09:32 h	42
16.05	50mi	10th Berryman 50 Mile	10:31:28 h	24
18.04	50km	11th Double Chubb 50k	6:17:05 h	43
14.03	50mi	6th Land Between The Lakes 50 Mile Trail Run	9:48:58 h	22
21.02	50km	17th Sylamore Trail 50k Run	5:38:00 h	26
24.01	50km	15th Mountain Mist 50k	5:53:05 h	68
2008
15.11	24h	8th Ultracentric 24 Hour Run	70.878 km	49
18.10	50km	2nd Spirit of the Osage 50k	4:50:33 h	10
27.09	50km	14th Flatrock 50K	6:54:12 h	8
30.08	12h	4th Flatlanders 12 Hour Run	94.485 km	6
14.06	10h	2nd Run Under The Stars - Paducah	82.076 km	5
17.05	50mi	9th Berryman 50 Mile	10:36:04 h	18
19.04	50km	10th Double Chubb 50k	5:41:06 h	19
09.02	50km	4th Run Toto Run Psycho Wyco 50K	7:40:00 h	44
26.01	50km	14th Mountain Mist 50k	6:34:13 h	134
2007
20.10	50km	1st Spirit of the Osage 50k	5:10:45 h	12
14.10	50mi	21st Glacial Trail 50 Mile Race	11:15:24 h	26
29.09	50km	13th Flatrock 50K	6:58:15 h	9
01.09	12h	3rd Flatlanders 12 Hour Run	96.641 km	6
11.08	8h	17th Howl at the Moon 8h Run	62.265 km	50
14.07	50km	1st Psycho Psummer Run Toto Run 50K	6:37:56 h	24
09.06	12h	2nd Hawthorn Half Day Run	84.554 km	12
14.04	50km	9th Double Chubb 50k	5:40:58 h	21
2006
22.10	50km	4th Stone Steps 50K Trail Run	6:50:44 h	28
02.09	12h	2nd Flatlanders 12 Hour Run	87.725 km	15
12.08	8h	16th Howl at the Moon 8h Run	59.851 km	85
2004
14.08	8h	14th Howl at the Moon 8h Run	62.265 km	75
2002
20.04	50km	4th Double Chubb 50k	6:18:21 h	43
2001
10.11	50km	8th Quivering Quads 50K Trail Race	5:21:12 h	21
03.11	50km	9th OPSF Ultra 50 km Race	6:18:00 h	13
06.10	100mi	11th Arkansas Traveller 100	20:46:42 h	10
11.08	8h	11th Howl at the Moon 8h Run	77.151 km	12
05.05	24h	20th Cornbelt Running Club 24 Hour Run	71.133 km	47
07.04	100mi	7th Umstead Endurance Run 100 Miles	22:25:50 h	6
17.02	50km	9th Sylamore Trail 50k Run	5:19:06 h	9
27.01	50km	7th Mountain Mist 50k	5:31:18 h	33
2000
07.10	100mi	10th Arkansas Traveller 100	25:44:04 h	52
12.08	8h	10th Howl at the Moon 8h Run	69.571 km	16
30.07	50mi	4th Mount Rushmore Trail 50 Mile Run	14:15:00 h	11
24.06	24h	11th FANS 24 Hour Runs	128.924 km	25
22.01	50km	6th Mountain Mist 50k	6:23:06 h	60
1999
04.12	50mi	7th Kentucky Arches 50 Mile	9:17:32 h	25
13.11	50km	6th Quivering Quads 50K Trail Race	5:13:03 h	8
28.08	50km	Fairfield Trail Runs - 50 km	7:12:30 h	11
24.07	50mi	18th Minnesota Voyageur Trail 50 Mile Ultra	12:25:34 h	61
10.07	50km	5th Rattlesnake Trail 50K Ultrarun	5:35:45 h	40
10.04	50km	1st Double Chubb 50k	4:39:05 h	7
06.03	50mi	19th Carl Touchstone Memorial Mississippi Trail 50 Mile	9:11:33 h	10
23.01	50km	5th Mountain Mist 50k	6:26:04 h	56
1998
27.12	50km	2nd Huff 50K Trail Run	5:26:46 h	63
07.11	50mi	5th Quivering Quads 50M Trail Race	9:54:17 h	5
26.09	50km	4th Flatrock 50K	6:37:46 h	9
29.08	50km	Fairfield Trail Runs - 50 km	5:16:12 h	6

Filter

Runner	Races in common

DUV-index calculation details

#	Date	Race	Credited km	DUV-index+
✓ 1	3/2/2018	3rd Hallucination 24 Hour Trail Run	180,57	×2
✓ 2	13/5/2022	10th Cruel Jewel 100 Mile	170,59	×2
✓ 3	19/5/2017	5th Cruel Jewel 100 Mile	170,59	×2
✓ 4	28/7/2018	12th Burning River 100 Mile Endurance Run	164,15	×2
✓ 5	9/4/2022	22nd Potawatomi 100 Mile Trail Run	160,93	×2
✓ 6	30/10/2021	13th Ozark Trail 100 Mile Endurance Run	160,93	×2
✓ 7	2/10/2021	31st Arkansas Traveller 100	160,93	×2
✓ 8	10/9/2021	31th Superior Fall Trail Races 100 Mile	160,93	×2
✓ 9	24/7/2021	15th Burning River 100 Mile Endurance Run	160,93	×2
✓ 10	7/11/2020	12th Ozark Trail 100 Mile Endurance Run	160,93	×2
✓ 11	1/2/2020	28th Rocky Raccoon 100 Mile Trail Run	160,93	×2
✓ 12	2/11/2019	11th Ozark Trail 100 Mile Endurance Run	160,93	×2
✓ 13	5/10/2019	29th Arkansas Traveller 100	160,93	×2
✓ 14	3/11/2018	10th Ozark Trail 100 Mile Endurance Run	160,93	×2
✓ 15	15/6/2018	26th Bighorn Mountain Wild & Scenic 100 Mile Trail Run	160,93	×2
✓ 16	7/10/2017	27th Arkansas Traveller 100	160,93	×2
✓ 17	5/11/2016	8th Ozark Trail 100 Mile Endurance Run	160,93	×2
✓ 18	1/10/2016	26th Arkansas Traveller 100	160,93	×2
✓ 19	14/11/2015	2nd Tunnel Hill 100 Mile Race	160,93	×2
✓ 20	6/6/2009	14th Kettle Moraine 100 Mile Endurance Run	160,93	×2
✓ 21	6/10/2001	11th Arkansas Traveller 100	160,93	×2
✓ 22	7/4/2001	7th Umstead Endurance Run 100 Miles	160,93	×2
✓ 23	7/10/2000	10th Arkansas Traveller 100	160,93	×2
✓ 24	24/6/2000	11th FANS 24 Hour Runs	128,92	×1
✓ 25	24/2/2023	10th Lake Ouachita Vista Trail Endurance 100 km Run (LOViT)	100,00	×1
✓ 26	5/6/2021	6th Eagle Up Ultra 100 km	100,00	×1
✓ 27	1/9/2007	3rd Flatlanders 12 Hour Run	96,64	×1
✓ 28	30/8/2008	4th Flatlanders 12 Hour Run	94,49	×1
✓ 29	18/6/2016	4th Dizzy GOAT 12 Hour Trail Run	91,73	×1
✓ 30	2/9/2006	2nd Flatlanders 12 Hour Run	87,73	×1
✓ 31	9/6/2007	2nd Hawthorn Half Day Run	84,55	×1
✓ 32	14/6/2008	2nd Run Under The Stars - Paducah	82,08	×1
✓ 33	22/11/2025	4th Fall Creek 50	80,47	×1
✓ 34	27/4/2024	16th Frisco Railroad 50 Mile Run	80,47	×1
✓ 35	11/11/2023	10th Tunnel Hill 50 Mile Race	80,47	×1
✓ 36	12/5/2018	2nd Dark Sky 50	80,47	×1
✓ 37	6/1/2018	5th Wild Azalea Trail Challenge	80,47	×1
✓ 38	11/3/2017	14th Land Between The Lakes 50 Mile Trail Run	80,47	×1
✓ 39	17/12/2016	9th Lookout Mountain 50 Mile Race	80,47	×1
✓ 40	13/2/2016	35th Cross Timbers Trail Run	80,47	×1
✓ 41	16/5/2015	16th Berryman 50 Mile	80,47	×1
✓ 42	18/4/2015	25th Ouachita Trail 50 Mile	80,47	×1
✓ 43	14/3/2015	12th Land Between The Lakes 50 Mile Trail Run	80,47	×1
✓ 44	10/1/2015	1st Cloudland Canyon 50 Mile Race	80,47	×1
✓ 45	1/11/2014	32nd Mountain Masochist 50 Mile Trail Run	80,47	×1
✓ 46	16/5/2009	10th Berryman 50 Mile	80,47	×1
✓ 47	14/3/2009	6th Land Between The Lakes 50 Mile Trail Run	80,47	×1
✓ 48	17/5/2008	9th Berryman 50 Mile	80,47	×1
✓ 49	14/10/2007	21st Glacial Trail 50 Mile Race	80,47	×1
✓ 50	30/7/2000	4th Mount Rushmore Trail 50 Mile Run	80,47	×1
✓ 51	4/12/1999	7th Kentucky Arches 50 Mile	80,47	×1
✓ 52	24/7/1999	18th Minnesota Voyageur Trail 50 Mile Ultra	80,47	×1
✓ 53	6/3/1999	19th Carl Touchstone Memorial Mississippi Trail 50 Mile	80,47	×1
✓ 54	7/11/1998	5th Quivering Quads 50M Trail Race	80,47	×1
✓ 55	11/8/2001	11th Howl at the Moon 8h Run	77,15	×1
✓ 56	5/5/2001	20th Cornbelt Running Club 24 Hour Run	71,13	—
✓ 57	15/11/2008	8th Ultracentric 24 Hour Run	70,88	—
✓ 58	12/8/2000	10th Howl at the Moon 8h Run	69,57	—
✓ 59	16/3/2012	3rd Howard Aslinger 12 Hour Endurance Run	68,09	—
✓ 60	5/3/2021	1st Queeny Backyard Ultra	67,06	—
✓ 61	15/1/2022	4th Fierce Dragon Flintstrike 40	64,37	—
✓ 62	6/12/2009	20th Pine Mountain 40 Miles	64,37	—
✓ 63	12/8/2023	33rd Howl at the Moon 8 Hour Run	63,57	—
64	11/8/2007	17th Howl at the Moon 8h Run	62,27	—
65	14/8/2004	14th Howl at the Moon 8h Run	62,27	—
66	12/8/2006	16th Howl at the Moon 8h Run	59,85	—
67	3/2/2024	7th Beulah Challenge 9 Hour Race	55,36	—
68	16/9/2023	9th Rockin Rockwoods Trail Race	53,00	—
69	10/10/2015	1st Rockin Rockwoods Trail Race	53,00	—
70	25/5/2024	19th Hawthorn Half Day 6 Hour Run	51,66	—
71	12/6/2010	4th Run Under The Stars - Paducah	51,50	—
72	11/10/2025	7th Arrowhead 12 Hour Endurance Run	50,08	—
73	4/10/2025	11th The Hennepin Hundred - 50 km Run	50,00	—
74	23/8/2025	9th Shawnee Hills 100 - 50 km	50,00	—
75	2/3/2024	8th Ozark Highlands Endurance Run	50,00	—
76	2/12/2023	10th Jackson County 50-50 Ultramarathon - 50 km	50,00	—
77	21/10/2023	6th Big Hill Pond Walking Tall	50,00	—
78	14/1/2023	18th Swamp Stomper 50K	50,00	—
79	24/8/2019	3rd Shawnee Hills 100 - 50 km	50,00	—
80	21/4/2018	7th Cedro Peak 50 km Ultramarathon	50,00	—
81	16/9/2017	4th The Barkley Fall Classic	50,00	—
82	8/4/2017	3rd Ozarks Foothills 50K	50,00	—
83	28/1/2017	23rd Mountain Mist 50k	50,00	—
84	17/9/2016	3rd The Barkley Fall Classic	50,00	—
85	16/4/2016	18th Double Chubb 50k	50,00	—
86	9/4/2016	2nd Ozarks Foothills 50K	50,00	—
87	23/1/2016	22nd Mountain Mist 50k	50,00	—
88	3/10/2015	5th Rock Bridge Revenge 50 km Race	50,00	—
89	19/9/2015	2nd The Barkley Fall Classic	50,00	—
90	24/1/2015	21st Mountain Mist 50k	50,00	—
91	4/10/2014	4th Rock Bridge Revenge 50 km Race	50,00	—
92	12/7/2014	23th Full Moon Run - Midnight 50K	50,00	—
93	25/1/2014	20th Mountain Mist 50k	50,00	—
94	21/4/2012	14th Double Chubb 50k	50,00	—
95	22/1/2011	17th Mountain Mist 50k	50,00	—
96	16/10/2010	2nd Cumberland Trail 50k	50,00	—
97	25/9/2010	16th Flatrock 50K	50,00	—
98	29/9/2009	15th Flatrock 50K	50,00	—
99	11/7/2009	3rd Psycho Psummer Run Toto Run 50K	50,00	—
100	18/4/2009	11th Double Chubb 50k	50,00	—
101	21/2/2009	17th Sylamore Trail 50k Run	50,00	—
102	24/1/2009	15th Mountain Mist 50k	50,00	—
103	18/10/2008	2nd Spirit of the Osage 50k	50,00	—
104	27/9/2008	14th Flatrock 50K	50,00	—
105	19/4/2008	10th Double Chubb 50k	50,00	—
106	9/2/2008	4th Run Toto Run Psycho Wyco 50K	50,00	—
107	26/1/2008	14th Mountain Mist 50k	50,00	—
108	20/10/2007	1st Spirit of the Osage 50k	50,00	—
109	29/9/2007	13th Flatrock 50K	50,00	—
110	14/7/2007	1st Psycho Psummer Run Toto Run 50K	50,00	—
111	14/4/2007	9th Double Chubb 50k	50,00	—
112	22/10/2006	4th Stone Steps 50K Trail Run	50,00	—
113	20/4/2002	4th Double Chubb 50k	50,00	—
114	10/11/2001	8th Quivering Quads 50K Trail Race	50,00	—
115	3/11/2001	9th OPSF Ultra 50 km Race	50,00	—
116	17/2/2001	9th Sylamore Trail 50k Run	50,00	—
117	27/1/2001	7th Mountain Mist 50k	50,00	—
118	22/1/2000	6th Mountain Mist 50k	50,00	—
119	13/11/1999	6th Quivering Quads 50K Trail Race	50,00	—
120	28/8/1999	Fairfield Trail Runs - 50 km	50,00	—
121	10/7/1999	5th Rattlesnake Trail 50K Ultrarun	50,00	—
122	10/4/1999	1st Double Chubb 50k	50,00	—
123	23/1/1999	5th Mountain Mist 50k	50,00	—
124	27/12/1998	2nd Huff 50K Trail Run	50,00	—
125	26/9/1998	4th Flatrock 50K	50,00	—
126	29/8/1998	Fairfield Trail Runs - 50 km	50,00	—
127	4/2/2023	6th Beulah Challenge 9 Hour Race	48,44	—
128	15/7/2023	8th Get Your Butt Kicked 6 Hour Race	48,44	—
129	25/3/2023	17th Clinton Lake Ultra	48,28	—
130	20/7/2024	9th Get Your Butt Kicked 6 Hour Race	45,61	—