Augstenberg, Mountain summit at Silvretta range, Austria and Switzerland.

Augstenberg, also called Piz Blaisch Lunga, is a multi-peaked, partly glaciated massif on the Austria–Switzerland border. Its main north summit stands at 3,230 m, with a 3,224.7 m south summit 220 m away entirely in Switzerland. The Futschöl Pass (2,768 m) lies below its eastern side, and the Vadret da Futschöl and Chalausferner glaciers flank the peaks.

The name Augsten probably derives from the month of August, indicating that the slopes could only be hayed or grazed in that month. The Rhaeto-Romance name Piz Blaisch Lunga means roughly long, broad slope, from piz (peak) and blaisch lunga. The massif lies on the border between Galtür in Tirol and Scuol in Graubünden, with the main north summit on the border and the 3,224.7 m south summit entirely on Swiss soil.

The name Augsten probably comes from the month of August (Latin augustus), referring to slopes that could only be mown or grazed in that month. The Romansh name Piz Blaisch Lunga, in the Vallader idiom, means roughly "long, broad slope", with piz for peak. German and Romansh names thus sit side by side on the same massif.

Access to the peak is available from both valley sides via established climbing routes that require proper mountain gear and an experienced guide. Visitors should arrive with alpine experience and solid physical preparation.

The name Augsten probably comes from the month of August (Latin augustus), referring to slopes that could only be mown or grazed in that month. The Romansh name Piz Blaisch Lunga means roughly "long, wide slope", with piz meaning peak.