Lake Undozero Lake Undozero Lake Undozero () is a freshwater lake, located in the west of Plesetsky District of Arkhangelsk Oblast in Russia. It is one of the biggest lakes in Arkhangelsk Oblast and the second biggest one in Plesetsky District. The area of the lake is , and the area of its basin is . Lake Undozero is the source of the Undosha River, which belongs to the river basin the Onega River and thus to the White Sea basin. The lake has a sophisticated shape and contains a number of islands. The source of the Undosha is in the south-western
Onega Canal of the lake. At the mouth of the canal, in the selo of Voznesenye, a memorial obelisk has been erected. The canal lost its significance after Mariinsk Canal System was reconstructed and became Volga-Baltic Waterway. Onezhsky Canal was not reconstructed and became too shallow for larger boats. It is still navigable, but not used for regular navigation. Two rivers, Vozheroksa and Oshta, tributaries of Lake Onega, cross the canal. from the Vytegra, the canal crosses Lake Megrskoye, a large freshwater lake. There is weak current in the canal in the direction of the Svir. Onega Canal The Onega Canal ()