Mark Henderson (M66)
2026
1 Race | 150 mi.Jackalope Jam
Feb 20th 2026
| Cat Springs, TX
Duration
72 Hours
Overall
1
/ 11
Division (M)
1
/ 7
150
2025
14 Races | 1,344 mi.Oakwood 24
Nov 22nd 2025
| Raleigh, NC
Duration
24 Hours
Overall
10
/ 18
Division (M)
9
/ 11
66
Pumpkin Holler Hunnerd
Oct 18th 2025
| Tahlequah, OK
Distance
100 Miles
Overall
31
/ 37
Division (M)
23
/ 26
30:39:40
Heartland
Oct 11th 2025
| Cassoday, KS
Distance
100 Miles
Overall
30
/ 35
Division (M)
26
/ 30
29:49:58
Arkansas Traveller
Oct 4th 2025
| Perryville, AR
Distance
100 Miles
Overall
107
/ 109
Division (M)
85
/ 87
29:50:23
Texas Endurance Runs
Jul 26th 2025
| Ft. Worth, TX
Duration
48 Hours
Overall
1
/ 28
Division (M)
1
/ 21
118.75
Merrill's Mile
Jul 11th 2025
| Dahlonega, GA
Duration
48 Hours
Overall
38
/ 87
Division (M)
29
/ 68
100.506
Stevi's Roost 48 Hour Ultra
May 30th 2025
| Sylvania, GA
Duration
48 Hours
Overall
4
/ 37
Division (M)
3
/ 21
130.08
The Underground Circus 100
May 24th 2025
| Atlanta, GA
Duration
24 Hours
Overall
1
/ 7
Division (M)
1
/ 5
80
Outrun 24
May 3rd 2025
| Kirtland, OH
Duration
24 Hours
Overall
22
/ 99
Division (M)
17
/ 63
76.1854
Cannonball Run
Apr 25th 2025
| Ehrhardt, SC
Duration
24 Hours
Overall
2
/ 7
Division (M)
1
/ 3
85.8
Chief Ladiga 100
Apr 12th 2025
| Jacksonville, AL
Distance
100 Miles
Overall
21
/ 45
Division (M)
16
/ 32
25:43:35
The Swamp Fox Ultra
Mar 22nd 2025
| McClellanville, SC
Distance
105 Miles
Overall
2
/ 5
Division (M)
2
/ 4
32:54:19
Jackalope Jam
Feb 13th 2025
| Cat Springs, TX
Duration
72 Hours
Overall
1
/ 8
Division (M)
1
/ 5
140
Bleak Midwinter Endurance Run
Jan 25th 2025
| Springfield, MO
Duration
12 Hours
Overall
2
/ 7
Division (M)
2
/ 3
41.5
2024
17 Races | 1,606 mi.Pumpkin Holler Hunnerd
Oct 19th 2024
| Tahlequah, OK
Distance
100 Miles
Overall
37
/ 45
Division (M)
23
/ 26
29:38:01
Heartland
Oct 12th 2024
| Cassoday, KS
Distance
100 Miles
Overall
7
/ 21
Division (M)
3
/ 16
26:22:13
Arkansas Traveller
Oct 5th 2024
| Perryville, AR
Distance
100 Miles
Overall
85
/ 94
Division (M)
70
/ 78
29:03:01
Hell Creek 100
Sep 28th 2024
| Sylvan Grove, KS
Distance
100 Miles
Overall
4
/ 4
Division (M)
4
/ 4
30:44:00
Ultrapalooza
Sep 21st 2024
| Osawatomie, KS
Distance
100 Miles
Overall
2
/ 5
Division (M)
2
/ 4
27:42:17
Texas Endurance Runs
Jul 27th 2024
| Ft. Worth, TX
Duration
48 Hours
Overall
4
/ 23
Division (M)
3
/ 19
115
KUS 6/12/24 Hour Run
Jun 12th 2024
| Marquette, KS
Duration
24 Hours
Overall
5
/ 28
Division (M)
3
/ 19
81.2754
Merrill's Mile
Jun 8th 2024
| Dahlonega, GA
Duration
24 Hours
Overall
6
/ 31
Division (M)
6
/ 25
83.5884
The Underground Circus 100
May 25th 2024
| Atlanta, GA
Distance
100 Miles
Overall
4
/ 10
Division (M)
4
/ 6
27:40:43
High Lea 6/12/24 hour
May 18th 2024
| Richfield, OH
Duration
24 Hours
Overall
2
/ 11
Division (M)
2
/ 7
84
Outrun 24
May 4th 2024
| Kirtland, OH
Duration
24 Hours
Overall
13
/ 92
Division (M)
11
/ 56
84.205
C&O Canal 100
Apr 27th 2024
| Knoxville, MD
Distance
100 Miles
Overall
85
/ 120
Division (M)
69
/ 98
28:42:09
Virginia Run for Cancer
Apr 20th 2024
| Hampton, VA
Duration
24 Hours
Overall
18
/ 152
Division (M)
14
/ 109
81.75
Chief Ladiga 100
Apr 13th 2024
| Jacksonville, AL
Distance
100 Miles
Overall
26
/ 56
Division (M)
22
/ 46
26:18:55
Run with the Knights 24 Hr Ultra
Mar 23rd 2024
| Laurinburg, NC
Duration
24 Hours
Overall
3
/ 93
Division (M)
2
/ 56
100.388
#onemileatatime 24 Hour Challenge
Mar 16th 2024
| Griffin, GA
Duration
Backyard
Overall
6
/ 40
Division (M)
6
/ 52
75.6
Jackalope Jam
Feb 16th 2024
| Cat Springs, TX
Duration
48 Hours
Overall
2
/ 22
Division (M)
2
/ 11
100
2023
10 Races | 1,001 mi.Kansas Rails-to-Trails Extravaganza
Oct 28th 2023
| Ottawa, KS
Distance
100 Miles
Overall
14
/ 18
Division (M)
12
/ 16
27:51:23
Pumpkin Holler Hunnerd
Oct 21st 2023
| Tahlequah, OK
Distance
100 Miles
Overall
17
/ 36
Division (M)
13
/ 24
26:03:03
Heartland
Oct 14th 2023
| Cassoday, KS
Distance
100 Miles
Overall
8
/ 16
Division (M)
7
/ 14
27:57:44
Pine Creek Challenge
Sep 9th 2023
| Wellsboro, PA
Distance
100 Miles
Overall
13
/ 35
Division (M)
9
/ 27
23:19:00
Honey Badger 100
Jul 15th 2023
| Kingman, KS
Distance
100 Miles
Overall
4
/ 8
Division (M)
3
/ 7
25:30:50
3 Days at the Fair
May 12th 2023
| Augusta, NJ
Duration
48 Hours
Overall
1
/ 46
Division (M)
1
/ 23
150
C&O Canal 100
Apr 29th 2023
| Knoxville, MD
Distance
100 Miles
Overall
49
/ 79
Division (M)
43
/ 64
26:49:20
Blue Ridge Double Marathon
Apr 22nd 2023
| Roanoke, VA
Distance
52.4 Miles
Overall
26
/ 59
Division (M)
23
/ 42
5:08:13
Conquer The Wall Endurance Challenge
Mar 10th 2023
| Williamson, WV
Duration
35 Hours
Overall
6
/ 16
Division (M)
3
/ 7
98.4
Grandmaster Ultras
Feb 10th 2023
| Mesquite, NV
Distance
100 Miles
Overall
8
/ 22
Division (M)
6
/ 14
33:25:56
2022
5 Races | 601 mi.Across the Years
Dec 28th 2022
| Peoria, AZ
Duration
48 Hours
Overall
6
/ 76
Division (M)
4
/ 39
146.685
Heartland
Oct 8th 2022
| Cassoday, KS
Distance
100 Miles
Overall
12
/ 20
Division (M)
8
/ 16
25:57:02
Habanero Hundred
Aug 20th 2022
| Cat Spring, TX
Distance
100 Miles
Overall
11
/ 28
Division (M)
10
/ 25
25:24:20
Honey Badger 100
Jul 9th 2022
| Kingman, KS
Distance
100 Miles
Overall
4
/ 10
Division (M)
4
/ 9
23:49:27
3 Days at the Fair
May 13th 2022
| Augusta, NJ
Duration
48 Hours
Overall
2
/ 54
Division (M)
2
/ 31
154
2021
2 Races | 188 mi.KUS 6/12/24 Hour Run
Nov 12th 2021
| Marquette, KS
Duration
24 Hours
Overall
5
/ 31
Division (M)
5
/ 23
88.2
Heartland
Oct 9th 2021
| Cassoday, KS
Distance
100 Miles
Overall
4
/ 17
Division (M)
4
/ 14
26:42:46
2014
2 Races | 87 mi.Capt'n Karl's - Muleshoe Bend
Jul 19th 2014
| Marble Falls, TX
Distance
60 KM
Overall
41
/ 59
Division (M)
35
/ 49
9:44:29
Cross Timbers Trail Run
Feb 15th 2014
| Gordonville, TX
Distance
50 Miles
Overall
14
/ 34
Division (M)
11
/ 26
11:05:14
2012
1 Race | 52 mi.8 Hour Run from the Ducks Ultra-marathon
Sep 29th 2012
| Weatherford, TX
Duration
8 Hours
Overall
1
/ 10
Division (M)
1
/ 9
52.25
2011
4 Races | 168 mi.Capt'n Karl's - Muleshoe Bend
Aug 27th 2011
| Marble Falls, TX
Distance
60 KM
Overall
25
/ 59
Division (M)
22
/ 51
8:32:00
Hells Hills Trail Race
Apr 2nd 2011
| Smithville, TX
Distance
50 Miles
Overall
7
/ 51
Division (M)
7
/ 39
8:32:46
Grasslands Trail Run
Mar 19th 2011
| Decatur, TX
Distance
50 Miles
Overall
2
/ 25
Division (M)
2
/ 22
7:53:00
Cowtown Ultra
Feb 27th 2011
| Fort Worth, TX
Distance
50 KM
Overall
18
/ 245
Division (M)
16
/ 181
4:28:52
2009
1 Race | 50 mi.Pocatello 50
May 23rd 2009
| Pocatello, ID
Distance
50 Miles
Overall
25
/ 56
Division (M)
22
/ 47
11:58:00
2008
1 Race | 62 mi.Bandera
Jan 5th 2008
| Bandera, TX
Distance
100 KM
Overall
3
/ 89
Division (M)
3
/ 66
11:25:41
2007
4 Races | 300 mi.Warda Cardiac Run
Nov 17th 2007
| Warda, TX
Distance
50 Miles
Overall
1
/ 13
Division (M)
1
/ 9
6:58:02
Heartland
Oct 13th 2007
| Cassoday, KS
Distance
100 Miles
Overall
2
/ 52
Division (M)
2
/ 37
17:37:15
Lean Horse
Aug 27th 2007
| Custer, SD
Distance
100 Miles
Overall
4
/ 66
Division (M)
4
/ 48
18:06:00
Devil's Backbone
Jul 14th 2007
| Bozeman, MT
Distance
50 Miles
Overall
22
/ 25
Division (M)
18
/ 19
18:52:00
2006
6 Races | 312 mi.Warda Cardiac Run
Nov 18th 2006
| Warda, TX
Distance
50 Miles
Overall
1
/ 11
Division (M)
1
/ 5
6:59:51
Heartland
Oct 14th 2006
| Cassoday, KS
Distance
100 Miles
Overall
1
/ 47
Division (M)
1
/ 37
18:50:23
Wickham Park Marathon
May 28th 2006
| Melbourne, FL
Distance
50 Miles
Overall
1
/ 2
Division (M)
1
/ 2
9:21:11
Prickly Pear
May 6th 2006
| San Antonio, TX
Distance
50 KM
Overall
2
/ 50
Division (M)
2
/ 41
4:57:28
Hells Hills Trail Race
Apr 30th 2006
| Smithville, TX
Distance
50 KM
Overall
4
/ 28
Division (M)
4
/ 21
4:29:48
Ruth Anderson
Apr 22nd 2006
| San Francisco, CA
Distance
50 Miles
Overall
2
/ 15
Division (M)
2
/ 13
6:32:48
2005
10 Races | 642 mi.Sunmart Texas Trails
Dec 3rd 2005
| Huntsville, TX
Distance
50 Miles
Overall
3
/ 192
Division (M)
3
/ 144
6:48:04
UltraCentric Gold Rush
Nov 26th 2005
| Grapevine, TX
Duration
48 Hours
Overall
1
/ 3
Division (M)
1
/ 3
136.29
Rockledge Rumble
Nov 5th 2005
| Grapevine, TX
Distance
50 KM
Overall
1
/ 71
Division (M)
1
/ 52
4:18:46
Rocky Raccoon 50k/25k
Oct 22nd 2005
| Huntsville, TX
Distance
50 KM
Overall
1
/ 95
Division (M)
1
/ 76
3:51:30
Heartland
Oct 8th 2005
| Cassoday, KS
Distance
100 Miles
Overall
1
/ 43
Division (M)
1
/ 35
17:14:53
Bohemian Alps 50K
Sep 17th 2005
| Brainard, NE
Distance
50 Miles
Overall
1
/ 16
Division (M)
1
/ 16
6:54:00
Lean Horse
Aug 27th 2005
| Custer, SD
Distance
100 Miles
Overall
6
/ 59
Division (M)
6
/ 51
19:26:12
Miwok
Apr 30th 2005
| Stinson Beach, CA
Distance
100 KM
Overall
22
/ 223
Division (M)
19
/ 157
10:07:32
Hog's Hunt
Apr 2nd 2005
| Huntsville, TX
Distance
50 KM
Overall
1
/ 78
Division (M)
1
/ 54
3:54:13
Grasslands Trail Run
Mar 26th 2005
| Decatur, TX
Distance
50 Miles
Overall
1
/ 21
Division (M)
1
/ 17
8:33:58
2004
1 Race | 50 mi.Sunmart Texas Trails
Dec 4th 2004
| Huntsville, TX
Distance
50 Miles
Overall
7
/ 180
Division (M)
7
/ 125
7:12:55
2003
2 Races | 150 mi.Sunmart Texas Trails
Dec 6th 2003
| Huntsville, TX
Distance
50 Miles
Overall
35
/ 213
Division (M)
31
/ 159
8:13:00
Heartland
Oct 11th 2003
| Cassoday, KS
Distance
100 Miles
Overall
1
/ 34
Division (M)
1
/ 31
18:41:03
2002
4 Races | 281 mi.Heartland
Oct 12th 2002
| Cassoday, KS
Distance
100 Miles
Overall
2
/ 34
Division (M)
2
/ 26
17:52:00
Bohemian Alps 50K
Sep 21st 2002
| Brainard, NE
Distance
50 Miles
Overall
1
/ 15
Division (M)
1
/ 13
7:51:10
Hells Hills Trail Race
Apr 27th 2002
| Smithville, TX
Distance
50 KM
Overall
4
/ 66
Division (M)
4
/ 55
4:57:58
Rocky Raccoon
Feb 2nd 2002
| Huntsville, TX
Distance
100 Miles
Overall
15
/ 91
Division (M)
11
/ 67
19:15:16
2001
7 Races | 535 mi.Sunmart Texas Trails
Dec 1st 2001
| Huntsville, TX
Distance
50 Miles
Overall
9
/ 193
Division (M)
9
/ 146
6:59:55
Heartland
Oct 13th 2001
| Cassoday, KS
Distance
100 Miles
Overall
1
/ 29
Division (M)
1
/ 23
17:17:05
Badwater 135
Jul 23rd 2001
| Death Valley, CA
Distance
135 Miles
Overall
15
/ 55
Division (M)
14
/ 50
41:22:40
Wickham Park Marathon
May 27th 2001
| Melbourne, FL
Distance
50 Miles
Overall
1
/ 2
Division (M)
1
/ 2
10:20:15
Zane Grey
Apr 28th 2001
| Payson, AZ
Distance
50 Miles
Overall
17
/ 65
Division (M)
14
/ 54
11:57:18
Cross Timbers Trail Run
Mar 17th 2001
| Gordonville, TX
Distance
50 Miles
Overall
1
/ 23
Division (M)
1
/ 20
8:32:42
Rocky Raccoon
Feb 3rd 2001
| Huntsville, TX
Distance
100 Miles
Overall
5
/ 94
Division (M)
5
/ 73
17:11:40
2000
4 Races | 456 mi.Sunmart Texas Trails
Dec 2nd 2000
| Huntsville, TX
Distance
50 Miles
Overall
14
/ 188
Division (M)
12
/ 141
7:24:42
UltraCentric Gold Rush
Nov 24th 2000
| Grapevine, TX
Duration
48 Hours
Overall
1
/ 14
Division (M)
1
/ 11
205.54
Heartland
Oct 14th 2000
| Cassoday, KS
Distance
100 Miles
Overall
2
/ 23
Division (M)
2
/ 20
20:51:24
Rocky Raccoon
Feb 5th 2000
| Huntsville, TX
Distance
100 Miles
Overall
25
/ 91
Division (M)
23
/ 79
21:10:20
1999
2 Races | 150 mi.Sunmart Texas Trails
Dec 4th 1999
| Huntsville, TX
Distance
50 Miles
Overall
59
/ 254
Division (M)
54
/ 208
8:17:18
Arkansas Traveller
Oct 2nd 1999
| Perryville, AR
Distance
100 Miles
Overall
39
/ 84
Division (M)
35
/ 68
25:53:38
1998
1 Race | 50 mi.Sunmart Texas Trails
Dec 5th 1998
| Huntsville, TX
Distance
50 Miles
Overall
46
/ 269
Division (M)
33
/ 203
8:14:25
99
Races
27y 2m 24d
Longevity
8,235
Lifetime Miles
Personal Bests
50k
(7)
3:51:30
2005
50m
(22)
6:32:48
2006
100k
(2)
10:07:32
2005
100m
(36)
17:11:40
2001
24hr
(11)
100.3884
2024
12hr
(1)
41.5
2025
Backyard
(1)
75.6
2024
Distance by Year
2026
150
Miles
1 Race
2025
1,344
Miles
14 Races
2024
1,606
Miles
17 Races
2023
1,001
Miles
10 Races
2022
601
Miles
5 Races
2021
188
Miles
2 Races
2014
87
Miles
2 Races
2012
52
Miles
1 Race
2011
168
Miles
4 Races
2009
50
Miles
1 Race
2008
62
Miles
1 Race
2007
300
Miles
4 Races
2006
312
Miles
6 Races
2005
642
Miles
10 Races
2004
50
Miles
1 Race
2003
150
Miles
2 Races
2002
281
Miles
4 Races
2001
535
Miles
7 Races
2000
456
Miles
4 Races
1999
150
Miles
2 Races
1998
50
Miles
1 Race
Multiple Performances
Masters Winner
118.75
48 Hours
1st Place
118.75
48 Hours
3rd Place
130.08
48 Hours
3rd Place
81.2754
24 Hours
Senior Grand Master Course Record
83.5884
24 Hours
2nd Place
100.3884
24 Hours
Senior Grand Master Course Record
75.6
Backyard
1st Place
150
48 Hours
Masters Winner
150
48 Hours
2nd Place
154
48 Hours
2nd Place
7:53:00
50 Miles
3rd Place
11:25:41
100 KM
Masters Winner
11:25:41
100 KM
2nd Place
17:37:15
100 Miles
Masters Winner
17:37:15
100 Miles
Masters Winner
18:06:00
100 Miles
1st Place
18:50:23
100 Miles
Masters Winner
18:50:23
100 Miles
2nd Place
4:57:28
50 KM
Masters Winner
4:57:28
50 KM
Masters Winner
4:29:48
50 KM
Masters Winner
6:48:04
50 Miles
3rd Place
6:48:04
50 Miles
Masters Winner
4:18:46
50 KM
1st Place
4:18:46
50 KM
Masters Course Record
4:18:46
50 KM
Masters Course Record
3:51:30
50 KM
Masters Winner
3:51:30
50 KM
1st Place
3:51:30
50 KM
Masters Winner
17:14:53
100 Miles
1st Place
17:14:53
100 Miles
Masters Winner
3:54:13
50 KM
1st Place
3:54:13
50 KM
Masters Winner
18:41:03
100 Miles
1st Place
18:41:03
100 Miles
2nd Place
17:52:00
100 Miles
1st Place
17:17:05
100 Miles
Masters Winner
17:17:05
100 Miles
Achievements are awarded for races with 25 or more finishers and courses with 200 or more finishers.
Masters: 40-49 / Grand Masters: 50-59 / Senior Grand Masters: 60+