Mariska Mackenzie-Heyboer (F55)
2026
2 Races | 93 mi.Desert Rats Trail Running Festival
Apr 11th 2026
| Fruita, CO
Distance
50 KM
Overall
327
/ 422
Division (F)
97
/ 138
7:53:34
Black Canyon Ultras
Feb 14th 2026
| Mayer, AZ
Distance
100 KM
Overall
659
/ 765
Division (F)
170
/ 205
18:13:14
2025
2 Races | 62 mi.City to Sky 50K
Oct 19th 2025
| Missoula, MT
Distance
50 KM
Overall
131
/ 169
Division (F)
51
/ 68
8:37:31
Teton Mountain Runs
Jul 13th 2025
| Teton Village, WY
Distance
50 KM
Overall
63
/ 63
Division (F)
14
/ 14
11:40:13
2015
2 Races | 62 mi.Rut Mountain Runs
Sep 5th 2015
| Big Sky, MT
Distance
50 KM
Overall
284
/ 315
Division (F)
64
/ 72
11:18:12
Old Gabe
Jun 20th 2015
| Bozeman, MT
Distance
50 KM
Overall
31
/ 32
Division (F)
6
/ 7
10:53:14
2014
1 Race | 50 mi.Yellowstone-Teton Endurance Runs
Sep 20th 2014
| West Yellowstone, WY
Distance
50 Miles
Overall
10
/ 30
Division (F)
2
/ 13
10:39:00
7
Races
11y 6m 26d
Longevity
267
Lifetime Miles
Personal Bests
50k
(5)
7:53:34
2026
50m
(1)
10:39:00
2014
100k
(1)
18:13:14
2026
Distance by Year
2026
93
Miles
2 Races
2025
62
Miles
2 Races
2015
62
Miles
2 Races
2014
50
Miles
1 Race
Multiple Performances
2nd Place
10:39:00
50 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+