Forte San Rocco, Military fort in Trento, Italy

Forte San Rocco is a fortified structure built on a mountainside near Trento with stone walls carved partly into the rock face. It features gun emplacements, casemates, and underground passages characteristic of Alpine military design from that era.

Built between 1881 and 1883, Forte San Rocco was among the first forts of the Trento fortress system and the only one in its inner defensive ring. It was meant to block access to Trento from the Adige valley and Valsorda. By 1915 its masonry could not resist modern siege artillery, so it was disarmed: the four 15 cm M61 guns went to Monte Rosta and the two 12 cm M80 pieces to Monte Cornetto, later to Monte Rosta.

The fort is named after the Dosso di San Rocco, the hill on whose summit it stands in the San Rocco district of Trento. On the same site stood Castel Cedra, demolished in the 13th century. Since the 1980s the structure has been kept by a private holder, heir of one of the labourers who built it, who prevents water infiltration from damaging the work.

The fort stands on the Dosso di San Rocco at about 460 m, inside the Bosco della città municipal park on the southern edge of Trento. It is privately owned and cannot be visited; the structure is kept from decay by the heir of one of its builders. Views of the exterior are possible from the park paths.

A hidden underground passage, a poterna, links the hexagonal upper work to a caponier defending the left side of the moat; two more caponiers and a coffer, reached through subterranean galleries, covered the rest of the ditch. The upper work's circular inner plan eased the rotation of the two 12 cm guns in their Gruson armored dome.