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Europe

22 - 25 January 2026

19 - 22 March 2026

19 - 21 March 2026

09 - 12 April 2026

24 - 26 April 2026

01 - 03 May 2026

14 - 17 May 2026

15 - 17 May 2026

23rd May 2026

11 - 14 June 2026

12 - 14 June 2026

18 - 20 June 2026

24 - 28 June 2026

01 - 05 July 2026

09 - 11 July 2026

10 - 12 July 2026

15 - 19 July 2026

17 - 19 July 2026

24 - 26 July 2026

01 - 02 August 2026

06 - 08 August 2026

24 - 30 August 2026

10 - 13 September 2026

11 - 13 September 2026

18 - 20 September 2026

24 - 27 September 2026

30 - 31 October 2026

30 October - 01 November 2026

07 - 09 November 2025

Oceania

14 - 15 February 2026

14 - 17 May 2026

26 - 28 November 2026

North America

05 - 07 March 2026

09 - 12 April 2026

23 - 25 April 2026

15 - 17 May 2026

27 - 28 June 2026

23 - 25 July 2026

14 - 16 August 2026

21 - 23 August 2026

17 - 20 September 2026

01 - 03 October 2026

08 - 11 October 2026

13 - 15 November 2026

Asia

06 - 08 March 2026

14 - 15 March 2026

10 - 12 April 2026

30 April - 03 May 2026

12 - 14 June 2026

18 - 21 June 2026

11 - 13 September 2026

11 - 13 September 2026

16 - 18 October 2026

06 - 08 November 2026

10 - 12 December 2026

29 November - 07 December 2025

14 - 16 November 2025

17 - 19 October 2025

South America

18 - 22 March 2026

26 - 28 June 2026

31 July - 02 August 2026

17 - 20 September 2026

18 - 22 November 2026

Africa

29 - 31 May 2026

MYUTMB

Mariska MACKENZIE-HEYBOER

Nationality

United States of America

Age

55-59 Women
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UTMB Index

Index
20K
50K
100K
100M

329

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330

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Races

date
Race
country
Cat.
Distance /
m+
Time
Rank
Gender
Score
04.06.2025
MARATHON DES SABLES LEGENDARY 2025 - MARATHON DES SABLES LEGANDARY 2025
100K
250 KM
2710 M+
52:25:11
582 / 847
93 / 181
09.06.2015
RUN THE RUT 2015 - RUN THE RUT 50K
50K
49.9 KM
3050 M+
11:18:01
284 / 315
64 / 72
06.20.2015
Old Gabe 2015 - OLD GABE 50KM
50K
50 KM
3350 M+
10:53:14
31 / 32
6 / 7
09.14.2013
RUN THE RUT 2013 - RUN THE RUT 50K
50K
50 KM
3350 M+
10:02:00
138 / 148
30 / 32
08.10.2013
BRIDGER RIDGE RUN 2013
50K
31.6 KM
2070 M+
06:08:00
177 / 284
55 / 105

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UTMB® World Series - Ranking of trail runners by performance level on trail running

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