Lake Lacha 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. The etymological origin of the name is unclear. The river basin of Lake Lacha includes the southern and western parts of Kargopolsky District of Arkhangelsk Oblast, as well as north-west of Vologda Oblast. In particular,
Lake Kenozero shape is determined by the fact that Lake Kenozero is located in the rift of the earthcrust, in contrast to other lakes in Kenozersky National Park, all of them being of glacial origin. There are over 70 islands on Lake Kenozero. Until the 1990s, the lake served for timber rafting. The rafts were made in the course of the Undosha and the destination was the Onega. There are a dozen of villages at the lakeshore, the biggest of which are Vershinino and Pershlakhta. The road connects the northern shore (in particular, Ust-Pocha, Vershinino, and Pershlakhta) with "Onezhsky Trakt", the road