Riserva naturale I Giganti della Sila, State nature reserve in Province of Cosenza, Italy.

Riserva naturale I Giganti della Sila is a 5.44-hectare state nature reserve in the Province of Cosenza, within Sila National Park. It protects 58 Calabrian black pines (Pinus nigra var. calabrica), up to 45 metres tall with trunks about two metres across, forming a colonnade. Wild apple, beech, chestnut, aspen and seven century-old maples also grow here.

The reserve is the last remnant of the ancient Sila forest, which survived until the early 20th century. Much of it was felled after Italian unification to supply timber to the new Kingdom, and again in the immediate post-war period as payment to the British and American allies. Wood samples date part of the stand to 1620-1650, when a landowner planted it beside his summer house and a silk mill. The reserve was established in 1987 and has been managed by the FAI since June 2016.

The name Sila derives from an Oscan word equivalent to Latin silva, meaning forest; the Romans called the area Silva Brutia. The reserve is the last remnant of the ancient Sila forest, largely felled after Italian unification and again after World War II. Since June 2016 it has been managed by the FAI, and scenes from a film on Joachim of Fiore were shot among the pines.

Walking trails are clearly marked and guide visitors through the reserve, with access conditions varying by season throughout the year. It is helpful to check ahead before visiting, as certain periods may require advance reservations or have different visiting arrangements.

Each of the roughly 58 ancient trees in the reserve carries an information sign displaying its individual number and key details. This labeling allows visitors to recognize the differences among the giant trees and understand their individual character during a walk.