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UTMB World Series Events

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North America

02 - 04 October 2025

09 - 11 October 2025

22 - 23 November 2025

05 - 07 March 2026

09 - 12 April 2026

23 - 25 April 2026

27 - 28 June 2026

24 - 25 July 2026

14 - 16 August 2026

26 - 28 September 2025

18 - 21 September 2025

Asia

17 - 19 October 2025

17 - 19 October 2025

17 - 19 October 2025

08 - 09 November 2025

14 - 16 November 2025

29 November - 07 December 2025

06 - 08 March 2026

15 - 17 May 2026

26 - 28 September 2025

19 - 22 June 2025

01 - 04 May 2025

11 - 20 April 2025

01 - 02 March 2025

South America

18 - 22 November 2025

18 - 22 March 2026

26 - 28 June 2026

31 July - 02 August 2026

18 - 21 September 2025

Oceania

27 - 29 November 2025

14 - 15 February 2026

14 - 17 May 2026

Africa

29 - 31 May 2026

MY UTMB

Stefan LAZAROV

Nationality

Bulgaria

Age

20-34 Men

UTMB Index

Index

20K

50K

100K

100M

475

474

448

330

-

Races

date

Race

country

Cat.

Distance /
mt+

Time

Rank

Gender

Score

06.21.2025

Ultra-Trail® Vitosha 2025 - Vitosha 100 Km

100K

105 KM
2490 M+

17:15:25

443 / 726

374 / 583

09.22.2024

Pirin Extreme & Pirin Ultra 2024 - Pirin Extreme 38K

50K

38 KM
3300 M+

08:52:44

71 / 285

62 / 228

08.17.2024

DECATHLON Persenk Ultra 2024 - DECATHLON Orehovo Run

20K

30 KM
1600 M+

04:09:14

18 / 209

15 / 146

07.13.2024

Tryavna Ultra 2024 - 42km

50K

41.5 KM
1700 M+

06:02:52

97 / 256

85 / 204

10.21.2023

Rebel Trails Marathon 2023 - Rebel Trails Half Marathon

20K

20 KM
1400 M+

04:14:24

172 / 201

124 / 145

09.30.2023

K3 ULTRA GOLD BORDER RACE 2023 - GBR43

50K

43 KM
1400 M+

05:28:57

51 / 245

47 / 189

Statistics

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

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