Lake Lacha Kargopol with Lipin Bor via Sovza. Another unpaved road runs from Kargopol along the right bank of the Onega to the lake and then to the village of Bolshaya Kondratovskaya, several kilometers from the lakeshore. Lake Lacha Lake Lacha () is a freshwater lake, located in the south of Kargopolsky District of Arkhangelsk Oblast in Russia, south of the town of Kargopol. It is the largest lake in Arkhangelsk Oblast, with a surface area of and a basin area of . Lake Lacha is the source of the Onega River, one of the major waterways of the White Sea basin.
Lake Onega of the 15th–20th centuries. The complex includes a UNESCO World Heritage site, Kizhi Pogost. Eastern shores of the lake contain about 1,200 petroglyphs (rock engravings) dated to the 4th–2nd millennia BC. The major cities on the lake are Petrozavodsk, Kondopoga and Medvezhyegorsk. The lake is of glacial-tectonic origin and is a small remnant of a larger body of water which existed in this area during an Ice Age. In geologic terms, the lake is rather young, formed – like almost all lakes in northern Europe – through the carving activity of the inland ice sheets in the latter part of