The first Highline World Championships in Switzerland was full of daring as contestants competed against each other in events for both speed and acrobatics on a slackline at an altitude of 2,252 metres on the summit of Crap Sogn Gion mountain.
source https://www.cbc.ca/news/world/highline-competition-a-balancing-act-unlike-any-other-1.6527044?cmp=rss