In this chapter, we underline the importance of high mountain karren formation. For example, the study of the karren process allows us to understand the solution processes that are key to the development of a particular karst area. Furthermore, the karren process is a clear indicator of changing environmental conditions and can be used to establish the value of soil denudation. We also provide an overview of the history of karren research in this chapter. The major stages of this process are the following: the karren was recognized in the late nineteenth century; the terminology of the karren forms has been created in the early and the middle part of the twentieth century; the genetic systematization of the karren forms in the later twentieth century. Moreover, we discuss the main characteristics of the high mountain karstification, the associated karst forms and their belt pattern formation.