The Altenalp Türm are a distinctive series of rock pinnacles or towers located in the Alpstein massif of the Appenzell Alps in eastern Switzerland. Part of the larger Säntis-Alpstein region, these formations are a notable geological feature and a popular destination for mountaineers and hikers.
Location and Geography: The Altenalp Türm are situated within the canton of Appenzell Innerrhoden, specifically overlooking the Altenalp valley, from which they derive their name. They are part of the ridge that extends from the Marwees peak towards the Widderalp. The surrounding landscape is characterized by rugged limestone formations, alpine meadows, and steep cliffs, typical of the Alpstein range. The area is part of the Swiss Prealps.
Geology and Formation: These striking rock formations are primarily composed of limestone, a common rock type in the Alpstein massif. Their sharp, tower-like appearance is the result of millions of years of erosion, tectonic activity, and glacial action shaping the original rock layers. The differential erosion of softer and harder rock strata, coupled with the characteristic fracturing of limestone, has sculpted these prominent vertical features.
Mountaineering and Recreation: The Altenalp Türm are well-known within the climbing community for offering various routes of different difficulties, ranging from moderate scrambling to challenging technical climbs on solid limestone. They are often accessed from trails leading from areas like Schwägalp or Wasserauen, passing through scenic alpine terrain. The panoramic views from the summits of these towers, encompassing the surrounding Alpstein peaks, Lake Constance, and parts of the Swiss Plateau, are highly regarded. Due to their exposed nature, visits to the Altenalp Türm require appropriate equipment, experience, and awareness of alpine conditions.