Fluchthorn, Alpine summit in Silvretta range, Austria and Switzerland

Fluchthorn is a four-summit massif in the Silvretta Alps on the Austria-Switzerland border, between Galtür in Tyrol and the Valsot exclave in Graubünden. Its highest point is the middle summit at 3,397 m; the southern summit, formerly the highest at 3,399 m, lost 19 m and its summit cross in a rockfall on 11 June 2023. The massif lies at the German-Rhaeto-Romanic language boundary.

The mountain long served as a boundary marker between Austrian and Swiss Alpine regions. In June 2023, permafrost thaw triggered a major rockfall on the southern face, substantially altering the peak's geography.

The name Fluchthorn comes from local hunters' language and refers to the escape routes of hunted chamois. In the 19th century the middle summit was called Rennerspitze after the Stuttgart alpine pioneer E. Renner, and the 1774 Atlas Tyrolensis marked the chain as Wälsch Berg. The Heidelberg section of the German Alpine Club donated the summit cross in 1989 for the centenary of the Heidelberg Hut; it stood on the southern summit until the 2023 collapse.

Check current route conditions before attempting the ascent, as geological changes from the 2023 rockfall have altered established climbing paths. Local information about available routes and required safety gear should be obtained before heading out.

The peak gained attention because a rockfall caused by permafrost thaw changed its height, a rare event in the European Alps. This shift made the middle crest the highest point and highlighted how climate change affects mountain terrain.