Rochefort Castle, Medieval castle ruins in Rochefort, Switzerland.

Rochefort Castle comprises the remains of a fortress perched on a rocky outcrop at 805 meters elevation, commanding views over Lake Neuchâtel and the approach to Val-de-Travers. The ruins reveal multiple building phases integrated into the natural rock formation, with sections of stone walls and foundations still standing.

The site was occupied since Antiquity and possibly in Prehistory, but the visible remains are medieval. Researchers reconstructed a first castle plan, reworked and enlarged in the 13th and 15th centuries. The castle was abandoned during the 15th century, and a source already calls it a ruin in 1512.

The toponym Rochefort comes from the site's position at the top of the cliffs of the Areuse gorges, which gave the place its name. The castle appears on an 18th-century map and was already described as a ruin in a 1512 source, so the name outlived the building itself. The ruins stand in the forest on the edge of the village of Rochefort.

The ruins lie in forest on the edge of Rochefort village and cannot be reached by road; access is on foot, with the path partly cut into the rock along the east face of the spur, running north to south. Ground is uneven and the climb is steep in places.

Before the 2018 clearing, only a few stones of a tower were visible on the spur. The excavations then exposed extensive masonry showing the full extent of the fortifications, and the 2018 and 2019 digs were school excavations for archaeology students from the universities of Neuchâtel and Lausanne.