Abstract: The subject of this article is the archaeological material unearthed during the excavations of the multi-layered monument Ust-Menza 5 in Western Transbaikal. As the research object, the authors consider the oldest industries of the Ust-Menzinsky archaeological complex in a wide chronological range from the end of the Middle Paleolithic to the Bronze Age. The authors present in detail the history of the study of the monument and introduce the results of the latest research. This article is the first step towards the analysis of the archaeological material from the Ust-Menzinsky complex of monuments associated with high river terraces. The authors consider the high terraces as Middle Pleistocene elevations from 20 meters onwards. The basis for the study of high elevations was already laid in the 1980s, but at that time they were not given sufficient attention. The study of Ust-Menza 5 was conducted using the latest methods of interdisciplinary research. Particular attention is paid to the geomorphological and stratigraphic analysis of sediments, which revealed archaeological materials. For the stone industry, the authors used morphological, technological and typological methods. The novelty of this work consists in its introduction into scientific circulation of new data from the Upper Paleolithic and Bronze Age and the authors' presentation of their vision regarding the place of these materials in the historical and chronological periodization of the region. The authors conducted a regional correlation of the materials. The aim of this article is to present the latest research conducted in the Ust-Menza 5 lot, which is connected to the IV terrace above the floodplain. A detailed analysis of the stratigraphic context and stone inventory will enable to see the possibilities of studying multi-layered monuments at high terraced levels.