The trend of present geomorphic processes in the area of the High Tatras alpine belt demonstrates the growth in intensity, frequency and influence on the environment in connection with climatic conditions which transform the alpine landscape. One morpho-dynamic phenomenon of the Tatras glacial valleys is the infilling of alpine lakes by sediments and their gradual shrinkage. Important factors include slope gravitational processes such as rock falls and toppling, hydro-gravitational debris flows and the nivational processes ground avalanches. Each of these processes transfers a different type and amount of material of various grain composition and accumulation in the hydric zone of these alpine lakes. These important factors all influence the structural-lithological and morphogenetic conditions in surrounding slopes and ridges. Dynamics and frequency of these processes closely correspond with seasonal occurrences of extreme meteorological conditions, and their sudden changes have been confirmed by the current research of morpho-dynamic processes affecting the timberline in the High Tatra Mts. The aim of this paper is to emphasize the spatio-temporal extension of geo-morphologic processes and to demonstrate the development of alpine lake sedimentary deposition in selected valleys in the High Tatra Mountains.