The analysis of the cultural and settlement situation in the Upper San River basin in the Late Roman Period and the early phase of the Migration Period (timespan between phases C2 and D) is difficult due to the small database. In addition to materials from the partially researched settlement in Lesko and recently excavated (during the investment works on the bypass of Sanok) settlement in Sanok 59-60, the materials from these phases are primarily stray finds, such as metal fragments of clothing, such as buckles or coins, discovered outside the archaeological context. It is important to underline that most of the wheel-made pottery finds have a wide chronological frame and it is a rare possibility to narrow pottery dating. Despite the limited amount of data, they provide the basis for the new analysis of the archaeological material and settlement situation in this area dated roughly to the Late Roman Period and Early Migration Period. In this context, wide-scale research, which for the first time allowed observation of the extent and organization of settlements, proved to be particularly important.