Monte Sasso, Mountain summit in San Fermo della Battaglia, Italy.

Monte Sasso is a mountain of Lombardy rising 614 metres above sea level, the highest summit of the Parco Spina Verde, above Cavallasca near the Swiss border. Its slopes are built of marine sedimentary rock, from Jurassic-Cretaceous limestone to Oligocene marls, sandstones and conglomerates, covered by moraine deposits from the last glaciation.

During the First World War, Monte Sasso was part of the Frontiera Nord, the defensive system known as the Linea Cadorna, built to stop an invasion of the Po Valley through neutral Switzerland. The trenches run from Colombirolo to Monte Olimpino. The system was abandoned in 1918. On 22 November 2008 the Associazione Nazionale Alpini of Como, after three years of work with the Parco Spina Verde, returned the recovered remains of the Fortino del Monte Sasso.

The church of the Pittori at Colombirolino, built in 1857 and consecrated the following year, is named for the 14 artists called in 1978 to decorate its 14 Stations of the Cross. Its pink facade has four yellow pilasters and a copper door showing Saint Roch, to whom it is dedicated.

Hiking here is possible year-round, though warmer months offer more comfortable conditions. Parking areas are located near the main trailheads, and the paths accommodate different fitness levels.

The western summit holds an agriturismo called "L'Agrifoglio". A second viewpoint, nicknamed "Pin Umbrela" for its maritime pine, was the symbol of the former Monte Olimpino ski club; from there you look over Cernobbio, Maslianico and the first basin of Lake Como.