Abstract <p>There are a lot of difficult to access volcanic lakes in the Kuril-Kamchatka region on the Russian Far East. These lakes are of particular interest to researchers due to the diversity of their basins forms and the very dynamic development. It’s also are very interesting because of their attractiveness and their high recreational potential often related to thermal waters. At the same time, they may bring a threat to the nearby population because of active volcanoes in their immediate vicinities. The origin and evolution of these water bodies are closely related to volcanic and post-volcanic processes, they are characterized by rapid changes of shape, level, composition of water and characteristics of the coast. Usually bounded by craters, calderas and in the immediate vicinity of volcanoes, these lakes present a kind of by-product of volcanism.</p>