Burg Hoheneybach, Medieval castle ruins in Geislingen an der Steige, Germany.

Burg Hoheneybach is a medieval castle ruin located on the Himmelsfelsen mountain in Geislingen an der Steige. The site still displays stone walls and a deep moat carved behind the rock formation.

The fortress was first documented in 1265 and initially belonged to the Counts of Helfenstein before they sold it to Ellwangen Monastery in 1291. In the 17th century it suffered severe damage during a major European conflict.

The name Hoheneybach comes from the lords of Eybach, a family likely serving the Helfensteins, who were first mentioned with the castle in 1265 and 1281. At least Ulrich von Ahelfingen, a later holder, took his name from the castle. The church in Eybach served as the burial place of the Degenfeld family, who made the castle their ancestral seat from 1456.

The ruins are reachable by hiking trails that link several historical sites across the Geislingen an der Steige region. The climb is manageable for people with average fitness and offers views over the surrounding area.

The Degenfeld family, who held the castle from 1456, built Schloss Eybach below the Himmelsfelsen in the mid-16th century, and the church in Eybach served as their burial place. The castle is thought to have still been inhabited around 1711, but by 1724 it was a ruin.