Registration for the World Masters Mountain Running Championships 2027 in Klosters is now open. From June 10th to 12th, 2027, Klosters will become the meeting place for the international Masters trail running scene. Runners aged 35 and over will compete in the three disciplines of uphill, long distance, and up-downhill. The routes lead along trails around Klosters and combine sporting challenge with nature experience and views of the Grisons mountains. All information about t