ヴァルダイ丘陵
The western part is a lowland around Lake Ilmen, while the eastern part is a highland (northern spurs of the Valdai Hills). The highest point is Mount Ryzhokha in the Valdai Hills (). In the center of the oblast is Lake Ilmen, one of the largest lakes in Central Russia. The major tributaries of Lake Ilmen are the Msta, which originates in the east of the Valdai Hills and collects the rivers in the east of the oblast, the Lovat, the Pola, and the Polist, which all flow to the lake from the south, and the Shelon, flowing from the southwest. The only outflow of the lake is the Volkhov, a major tributary of Lake Ladoga. Almost all of the oblast belongs to the river basin of the Volkhov. The exceptions are the northwest, which belongs to the river basin of the Luga, a tributary of the Baltic Sea, the north, belonging to the basin of the Syas, another tributary of Lake Ladoga, the east, which belongs to the basin of the Mologa, a tributary of the Volga, and the south, belonging to basins of various tributaries of the upper Volga River. Sorted by the discharge, the biggest rivers of the oblast are the Volkhov, the Mologa, the Msta, the Lovat, the Syas, and the Shelon.