Hohennagold Castle, Medieval castle ruins on Schlossberg hill, Nagold, Germany.

Hohennagold is castle ruins atop Schlossberg hill near Nagold with a distinctive keep, curtain walls, and multiple towers. The fortress spreads across the hilltop with an outer defensive area that connects half-round and angular defensive structures.

The Counts of Nagold built the first castle around 1100 and expanded it between 1153 and 1162; in 1145 they became Counts Palatine of Tübingen. The Counts of Hohenberg acquired it in the mid-13th century, and a branch calling itself Counts of Nagold turned it into their residence. In 1364 it passed to the Counts of Württemberg, who added bastions and towers. Bavarian troops took it in 1645 and the remnants were pulled down in 1646.

The name Hohennagold combines the Nagold river with the hilltop site, and the Counts of Hohenberg who held the castle from the mid-13th century had a branch call itself Counts of Nagold after it. The 25-metre defensive tower is open to climb, and the ruin is freely accessible at any time.

The climb from Nagold town center follows marked hiking paths that are fairly steep and take roughly half an hour. Good footwear is important since the paths go through woodland trails and include some steps.

Despite destruction during various conflicts, the basic structures remain surprisingly intact and clearly show how the fortress once looked. The stone construction with its thick walls helped the core of the stronghold survive for centuries even after bombardments and neglect.