The Skyrunner World Series is an annual international championship of skyrunning (high altitude endurance races) and the official International Skyrunning Federation (ISF) race circuit for mountain running. Each year the Skyrunner World Series presents a global Sky Racing calendar, attracting mountain running athletes from almost every country.
The Skyrunner World Series is an annual international championship of skyrunning (high altitude endurance races) and the official International Skyrunning Federation (ISF) race circuit for mountain running. Each year the Skyrunner World Series presents a global Sky Racing calendar, attracting mountain running athletes from almost every country.
Source: Wikipedia "Skyrunner World Series" · CC BY-SA 4.0
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