Tennen Mountains

The Tennengebirge is a rugged mountain range in the Northern Limestone Alps near Salzburg. It forms a high karst plateau of about 60 square kilometres, with more than half rising above 2,000 metres. The plateau is riven by deep gorges such as the Salzachöfen, where the river cuts through the limestone at its narrowest point. To the north the Lammer valley separates it from the Osterhorn Group, while to the east the Dachstein Mountains begin beyond the Lammer. Villages like Werfen, Abtenau and Annaberg-Lungötz lie along its edges, where the plateau falls away to gentler foothills. The range is famous for its caves, including the Eisriesenwelt near Werfen, the world’s largest ice cave at about 42 kilometres long. Other notable caverns are the Brunnecker Cave at Lueg Pass and the Platteneckeis–Berger–Bierloch system, which drops more than 1,000 metres. The Salzburg State Cave Research Association continues to explore and map new passages, some of which may affect future water supplies. The karst landscape also holds important geological layers such as the Werfen-St.-Martin Schuppen Zone of Lower Triassic rocks. Walkers find many Alpine paths across the plateau, though water is scarce and mist can disorient even experienced hikers. Several mountain huts offer refuge, including the Dr. Heinrich Hackel Hut on the southern edge, where climbers tackle the easier faces. The European long-distance trail E4 crosses the southern Tennen from Lungötz to Werfen, while the Arno Way skirts the western side. In winter the plateau becomes a route for ski tours, with some steeper lines attracting experts.