The author of this book has been working in different types of karren landscapes for more than fifteen years. The book summarizes the scientific results of syst- atic observations made during field trips as well as the interpretation of the data collected in the sample localities of the high mountain karren area, and specifically in the European Alps, using modern analytical methods. This book is written for graduate students and university professors of a variety of disciplines such as Physical Geography, Karst Geomorphology, Carbonate Mineralogy, Geology, Environmental Engineering, Forestry, and Soil Science. The introductory chapter of this book underlines the importance of high mo- tain karren formation, in addition to charting the history of karren research at high altitude, and describes the major characteristics of high mountain karstification. Chapter 2 provides information regarding the research sites and methods. In Chapter 3, the general characteristics of the karren formation in different vegetation zones are discussed. In Chapter 4, the specific environment, morphology, formation and the development of the different high mountain karren forms are covered.