The concept of the three pillars of sustainability first gained acceptance in tourism in 1999. From this point onwards, tourism destinations gradually applied this concept. This diploma thesis focuses on a qualitative analysis of the ski tourism destination Kaprun-Kitzsteinhorn, which defines itself as sustainable. The main aim of this thesis is to either validate or invalidate this self-perception. Therefore, a qualitative analysis on two areas is conducted. The analysis includes, on the one hand, research into literature and websites about the destination, to evaluate economic, environmental and social factors of sustainability with the focus on the Tauernkraftwerke, the Kitzsteinhorn Bergbahnen and the development of tourism in the destination since 1999. On the other hand, it includes an empirical study on five leading businesses in the tourism sector, analysing the implementation of aspects of sustainability on the normative, strategic and operative stage of their management. The five businesses were chosen out of five categories: food retailing, sports retailing, ropeways, hotel industry and hotel- related industry. The results of the analysis prove that aspects of sustainability, in the ski tourism destination Kaprun-Kitzsteinhorn, occur on all three pillars of sustainability and thus qualify it to be defined as sustainable. With the only exception of the Pension Jaga Hias, aspects of sustainability can be found in the managements of all leading businesses (Gletscherbahnen Kaprun AG, Sport Bründl Ges. m. b. H. & Co KG, Kaufhaus Neumair GmbH & Co KG and Tauern Spa World Betriebs GmbH & Co KG). However, only the GBK and TSP show sustainability on all three pillars and can thus be defined as sustainable.