The Thüster Berg is a ridge, up to 441 m above NN,[1] in the Lower Saxon Hills in central Germany.

The Thüster Berg lies within a triangle formed by the villages of Eime, Duingen and Salzhemmendorf in the western half of the Leine Uplands, which itself is in the northern part of the Lower Saxon Hills.

It lies between Hemmendorf and Oldendorf in the north, Ahrenfeld, Deilmissen and Deinsen in the south, Marienhagen in the southeast, Weenzen and Thüste in the south, Levedagsen and the Domäne Eggersen in the west and the village of Salzhemmendorf to the northwest.

The River Saale, a southwestern tributary of the Leine flows to the west and north of the ridge.

The rock ledge of the Eckturm (380 m above NN) juts out of the forest towards the northwest below the summit of the Kanstein and forms a natural observation platform.