The article is a continuation of a series of publications on monitoring petroglyphs of Olkhon region. It is devoted to a generalization of disparate data on petroglyphs Anga river valley (west coast of Lake Baikal), the refinement of its location and determining its current technical condition. We have identified the common features that unite all these points, and examined its features. Based on the developed A. P. Okladnikov and detailed L. V. Melnikova and V. S. Nikolayev chronological scheme of periodization of Baikal region petroglyphs we have identified chronological groups of drawings, dating from the Neolithic to the late Middle Ages. The article presents data on the current state of rock carvings, threats to its existence and recommendations for its conservation. In general, petroglyphs of the Anga river valley are monuments of spiritual culture of the ancient population in the Baikal region of the chronological range from the Neolithic to the Late Middle Ages. It reflects the outlook of taiga hunters and presents the stories that are associated with the world of the steppe nomads.