Wikipedia
Tristelhorn
The Tristelhorn (also known as Piz da Sterls) is a mountain of the Glarus Alps, located on the border between the Swiss cantons of St. Gallen and Graubünden. Reaching a height of 3,114 metres above sea level, it is one of the highest summits in the canton of St. Gallen.
The Tristelhorn is located west of the Ringelspitz, on the range separating the Calfeisen valley (St. Gallen) from the Rhine valley near Flims (Graubünden).