Plesetsky District
The basin of Lake Kenozero covers a vast area in the western part of Plesetsky District and some minor areas of Onezhsky District. The main tributary of the lake is the Pocha, which, in turn, flows out of Lake Pochozero. The main tributary of Lake Pochozero is the Undosha. The source of the Undosha is Lake Undozero, one of the biggest lakes of the region, and a major right tributary is the Toksha.