![2020 SKYRUNNING WORLD CHAMPIONSHIPS: BUFF MOUNTAIN FESTIVAL FROM JULY 9 TO JULY 11, 2021 - TrailrunningSpain.com 2020 SKYRUNNING WORLD CHAMPIONSHIPS: BUFF MOUNTAIN FESTIVAL FROM JULY 9 TO JULY 11, 2021 - TrailrunningSpain.com](https://i0.wp.com/trailrunningspain.com/wp-content/uploads/2021/06/The-spectacular-Vall-de-Boi-in-the-Spanish-Pyrenees-2020-Skyrunning-Word-Championships-venue.-%C2%A9Diego-Escobedo.jpg?ssl=1)
2020 SKYRUNNING WORLD CHAMPIONSHIPS: BUFF MOUNTAIN FESTIVAL FROM JULY 9 TO JULY 11, 2021 - TrailrunningSpain.com
![BUFF® Epic Trail SkyRunning World Championships Vall de Boí confirms its final dates: July 8-11, 2021 - Buff Mountain Festival BUFF® Epic Trail SkyRunning World Championships Vall de Boí confirms its final dates: July 8-11, 2021 - Buff Mountain Festival](https://www.buffmountainfestival.com/wp-content/uploads/2020/07/sortida.jpg)
BUFF® Epic Trail SkyRunning World Championships Vall de Boí confirms its final dates: July 8-11, 2021 - Buff Mountain Festival
![La Vall de Boí da un nuevo formato al BUFF® Epic Trail para celebrar la prueba, del 4 al 6 de septiembre, con la máxima seguridad - Buff Mountain Festival La Vall de Boí da un nuevo formato al BUFF® Epic Trail para celebrar la prueba, del 4 al 6 de septiembre, con la máxima seguridad - Buff Mountain Festival](https://www.buffmountainfestival.com/wp-content/uploads/2020/08/BET-01-1.jpg)
La Vall de Boí da un nuevo formato al BUFF® Epic Trail para celebrar la prueba, del 4 al 6 de septiembre, con la máxima seguridad - Buff Mountain Festival
![2020 SKYRUNNING WORLD CHAMPIONSHIPS: BUFF MOUNTAIN FESTIVAL AT VALL DE BOÍ, RACE PREVIEW - TrailrunningSpain.com 2020 SKYRUNNING WORLD CHAMPIONSHIPS: BUFF MOUNTAIN FESTIVAL AT VALL DE BOÍ, RACE PREVIEW - TrailrunningSpain.com](https://i0.wp.com/trailrunningspain.com/wp-content/uploads/2021/07/Vall_de_boi_mayayo.jpg?ssl=1)