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UTMB World Series Events

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North America

10 - 12 September 2026

17 - 20 September 2026

01 - 03 October 2026

08 - 11 October 2026

13 - 15 November 2026

04 - 06 March 2027

08 - 11 April 2027

22 - 25 April 2027

14 - 16 May 2027

04 - 06 June 2027

21 - 23 August 2026

14 - 16 August 2026

23 - 25 July 2026

27 - 28 June 2026

Asia

11 - 13 September 2026

11 - 13 September 2026

02 - 04 October 2026

16 - 18 October 2026

06 - 08 November 2026

13 - 15 November 2026

27 November - 06 December 2026

10 - 12 December 2026

08 - 10 January 2027

05 - 07 March 2027

09 - 11 April 2027

18 - 21 June 2026

12 - 14 June 2026

30 April - 03 May 2026

10 - 12 April 2026

14 - 15 March 2026

South America

17 - 20 September 2026

18 - 22 November 2026

01 - 04 April 2027

24 - 27 June 2027

30 July - 01 August 2027

20 - 22 March 2026

Oceania

26 - 28 November 2026

13 - 14 February 2027

13 - 16 May 2027

Africa

27 - 30 May 2027

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Collin WILLOUGHBY

United States of America

20-34 Men

20K

Unavailable UTMB Index

50K

Unavailable UTMB Index

100K

Unavailable UTMB Index

How does the calculation work?

Evolution

Result

How is my score calculated?

Why isn't my result appearing?

2025

September 19

100M

100M

Grindstone Trail Running Festival by UTMB

Cat.

100M

country

Distance

167.4 KM

6400 M+

Time

33:37:18

Rank

66

109

Gender

57

96

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

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