Reventino is a massif in the southern Apennines, in Calabria, southern Italy. It has a maximum elevation of . It marks the narrowest point of the Italian peninsula, being at the top of the Isthmus of Catanzaro that separates the Ionian and Tyrrhenian Seas.
The massif is bordered by the Savuto river valley from the north, the Sant'Eufemia Plain southwards, and the Tyrrhenian Sea and the Sila Piccola sub-range. The maximum elevation is included in the territory of Platania.
The Reventino massif is located in the southern Apennines of Calabria in southern Italy, occupying the narrowest of the peninsula at the Isthmus of Marcellinara, where the distance between the Ionian Sea and the Tyrrhenian Sea is roughly 30 km. The massif lies mainly within the Province of Catanzaro and represents the western continuation of the Sila Piccola within the broader Apennine system. It rises near the Gulf of Lamezia Terme to the southwest and the Tyrrhenian coast to the west.
The massif spans varied terrain, bordered by the Savuto Valley to the north, the Plain of Sant'Eufemia to the south, the Tyrrhenian Sea to the west, and the Corace River to the east, where it meets a natural divide with the Sila massif. It covers part of several municipalities, including Lamezia Terme at its southwestern foothills, along with Conflenti, Decollatura, Platania, and Soveria Mannelli, among others, within the ComunitÃÂ Montana dei Monti Reventino. These administrative areas underscore the massif's importance as a key geographical feature in northern Calabria, linking coastal lowlands with the inland uplands.