Mader Stein, or Maderstein, is a 265 m (869 ft) (NHN) high hill in North Hesse, Schwalm-Eder-Kreis, north-east of the village of Maden, which belongs to the town of Gudensberg.

Basalt is relatively poor in nutrients and minerals for plants, and the summit of the hill is very hot and dry in summer, which gives rise to unique flora successions.

In particular, Dictamnus, a flowering plant in the family Rutaceae, is found on Mader Stein and Nenkel, although it is very rare in the rest of Germany.

[4] To maintain this situation the town of Gudensberg regularly sends people to cut down bushes (in particular blackthorn) that encroach on the summit of the hill.

[6] It is said that the Devil, who lived on Mader Stein (or the nearby Lamsberg), wanted to destroy the church with a stone.