From the Wikipedia page 
Podporozhsky District (Russian: Подпоро́жский райо́н) is an administrative and municipal district (raion), one of the seventeen in Leningrad Oblast, Russia. It is located in the northeast of the oblast and borders with Prionezhsky District of the Republic of Karelia in the north, Vytegorsky District of Vologda Oblast in the east, Babayevsky District of Vologda Oblast in the southeast, Tikhvinsky District in the south, Lodeynopolsky District in the southwest, and Olonetsky and Pryazhinsky Districts of the Republic of Karelia in the northwest. In the northeast, the district is bounded by Lake Onega. The area of the district is 7,679 square kilometers (2,965 sq mi), which makes it the largest district in Vologda Oblast. Its administrative center is the town of Podporozhye.