Burg Ehrenfels, Archaeological site on Schlossberg hill in Beratzhausen, Germany.

Burg Ehrenfels is a castle ruin perched on Schlossberg hill above Beratzhausen, consisting of wall remnants, foundations, and three round towers. The site rises approximately 150 meters above the Schwarze Laaber valley and commands views across the surrounding terrain.

The castle was first mentioned in a 1256 deed of Chunrad von Ernfels, a donation charter now held in the Augsburg state archive. On 23 August 1335 Emperor Ludwig the Bavarian enfeoffed Dietrich von Stauf with Ehrenfels, while Dietrich kept the manorial fiefs tied to Stauf; the family's main seat then moved to Ehrenfels. On 23 January 1492 Duke Albrecht IV took the castle after an eight-day siege, heavily damaging it, because the Stauffer zu Ehrenfels had joined the Löwlerbund knights' revolt. In 1567 the lordship was sold to Pfalz-Neuburg and the castle lost its role as administrative centre.

Argula von Grumbach, born a Reichsfreiin von Stauff around 1492, grew up at Ehrenfels and from 1523 published pamphlets defending Luther. The New Zealand theologian Peter Matheson traced her boldness to the pride of the Stauffer, among the foremost families of the Bavarian high nobility. In 1478 Hans von Stauff died; his Gothic plate-armour gravestone by cathedral master builder Roritzer is set on the west wall of Beratzhausen's rococo parish church.

The ruins can be reached from Beratzhausen by following the railway line toward Parsberg and looking for the hilltop on your left. The climb requires sturdy footwear and moderate fitness.

The core castle was split into two parts, a division still visible in the ruins and traced to a late-medieval enlargement of the original layout. South of it, the surviving ditch system points to a large outer bailey that has since vanished.