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Europe
07 - 09 November 2025
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
18 - 20 September 2026
31 October - 01 November 2025
31 October - 02 November 2025
26 - 28 September 2025
25 - 28 September 2025
Asia
08 - 09 November 2025
14 - 16 November 2025
29 November - 07 December 2025
06 - 08 March 2026
30 April - 03 May 2026
18 - 21 June 2026
11 - 13 September 2026
10 - 12 December 2026
17 - 19 October 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
North America
21 - 23 November 2025
05 - 07 March 2026
23 - 25 April 2026
27 - 28 June 2026
23 - 25 July 2026
14 - 16 August 2026
17 - 20 September 2026
08 - 11 October 2026
02 - 04 October 2025
Oceania
27 - 29 November 2025
14 - 15 February 2026
Africa
29 - 31 May 2026
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Bison Ultra-Trail® 2025 - Bison Ultra-Trail 100
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