Bärenburg, Medieval castle ruin near Andeer, Switzerland.

Bärenburg is a medieval castle ruin perched on a rocky hilltop near Andeer with preserved defensive walls and building remains. The site overlooks the valley and displays typical features of a strategically positioned fortification.

The origins of Bärenburg are undocumented; the lords of Bärenburg are first mentioned in 1257 with the brothers Konrad and Bartholomäus. The family, closely tied to the bishopric of Chur, died out in the male line by 1424. In 1450, during the Schams Feud, the castle was held by Schwyz and Glarus mercenaries and was destroyed; it could not be rebuilt without the consent of the Gotteshausbund.

The castle gave its name to the Bärenburg family, a knightly lineage first documented in 1257 with the brothers Konrad and Bartholomäus. The ruins appear on Andeer's coat of arms, and the nearby hamlet still bears the name Bärenburg.

The ruins lie at 1100 m above sea level on a wooded hill south of Andeer, above the hamlet of the same name. From the hamlet, a footpath branches right off the road above the houses and reaches the site in about ten minutes. The terrain is overgrown with rubble, so watch your footing.

In the winter of 1977/78 an eight-metre stretch of the eastern ring wall collapsed; the rubble has never been cleared, so the breach is still visible today. The castle also appears on Andeer's coat of arms.