Massiccio del Sirino, Mountain range in Basilicata, Italy.

Massiccio del Sirino is a mountain range in the Southern Apennines located in Basilicata. Monte Papa serves as its highest peak at around 2,000 meters and forms the dominant feature of this mountain complex.

The name Sirino comes from the ancient river Siris, today the Sinni, whose Sanskrit root sar means to flow. When Taranto destroyed the city of Siris at the river's Ionian mouth in the 5th century BC, its inhabitants moved inland up the valley; Pliny mentions these Sirini peoples, who gave the mountain its name.

The name Sirino comes from the ancient river Siris, today's Sinni, whose Sanskrit root sar means to flow. After Taranto destroyed the city of Siris at the river mouth in the 5th century BC, its inhabitants moved inland into the upper valley; Pliny mentions these Sirini peoples, who gave the mountain its name.

The massif lies between Lagonegro and Lauria, with trailheads at Lago Sirino (788 m) and near the Rifugio Italia at Lago Laudemio (1,525 m). Snow persists into late spring, and the ski lifts and slopes often stay open until then. Above the treeline it is windy almost daily, and summer temperatures rarely reach 20 °C.

The massif's glacial lakes are among its least-noticed features: Lago Laudemio, at 1,525 m, is the southernmost glacial lake in Italy, formed by the frontal moraine of a glacier that descended about four kilometres from the north side of Monte Papa during the Quaternary. Lago Zapano has the same origin, in a basin closed by the moraine of a second glacier.