The history of the Sigmund Thun Klamm is closely connected to that of the Bürgkogel in Kaprun. First Bronze Age settlements existed approx. 4,000 years ago; an expanded fortification, which would give this rock lift its name, was established in medieval times. Some parts of the castle walls have since been unearthed, other finds from Celtic and Roman times are exhibited in various Salzburg museums. The new Bürgkogelsteig extends the hike through the Sigmund Thun Klamm with Klammsee Reservoir. Hikers and mountaineers cherish the demanding rise with gorgeous views of the entire Kaprun Valley including lake, Limbergsperre and the Hohe Tauern.
The Bürgkogelsteig is open throughout the warmer seasons. Sturdy shoes and some mountain experience are a must.