Altenalp Türm, Mountain summit in Appenzell Innerrhoden, Switzerland

Altenalp Türm is a ridge of three summit points in the Alpstein chain of the Appenzell Alps, above the Seealpsee in the canton of Appenzell Innerrhoden. The Western (2017 m), Middle (2032 m) and Eastern (about 1960 m) summits are joined by the crest; only the first two are height-marked on the national map. The Altenalp, an alpine farm at 1595 m where walkers can stay overnight, lies east of the towers.

The peak has served as a landmark in the Alpine landscape since the 1800s as the region developed its mountain trails and climbing traditions. Local climbers gradually established routes through this area over many decades, shaping the path system that exists today.

The name comes from the Altenalp, an alpine farm at 1,595 m east of the towers and south of the Schäfler, which serves food and offers overnight stays from June to September. The three summit points are called the Western (2,017 m), Middle (2,032 m) and Eastern (about 1,960 m) peaks.

The climb requires mountaineering experience and equipment such as ropes and carabiners, particularly on the steeper sections of the route. Visitors should start early in the day to ensure adequate daylight for the technically demanding passages and changing weather conditions.

The northernmost point of Switzerland above 2,000 m lies on this ridge, not on the main summit: the western top is 2,017 m, the middle 2,032 m, and the eastern about 1,960 m. The three points are joined by a crest above the Seealpsee.