Toga Castle is a defensive structure of Arab origin situated in the lower part of the municipality of Toga, alongside the Mijares River, in the Alto Mijares district (Castellón). Its strategic position by the river evidences its function as a watchtower and control post of the river passage during the Islamic period.

With an irregular floor plan, the castle was initially erected by Muslims as a defensive structure. Following the Christian Reconquest, it was transformed into a habitable castle-palace, adapting to the new residential and administrative needs of the feudal lords of the area. This conversion process was common in many fortresses of the Valencian region during the 13th and 14th centuries.

Currently, only partial remains of the old medieval fortress are preserved from the complex. The visible structures allow one to discern the original scale of the construction, although its state of preservation is fragmentary. The location by the Mijares River offers a natural setting that complements a visit to the ruins.

The castle is located in the municipality of Toga, a small town in the Alto Mijares district accessible from the CV-190. In the surrounding area, the Hermitage of San Juan and Santa Bárbara also stand out, complementing the historical and religious heritage of the municipality.

A notable feature is the castle's integration into the riparian landscape of the Mijares, which sets it apart from other fortresses in the province situated at higher elevations. Its inclusion in the El Cid Route enhances the complex within the cultural routes of the Castellón interior.