The total area of the Somadida Oriental Nature Reserve is 1676 hectares, and extends between a flat area along the Ansiei stream and the dolomitic and limestone rocks of Marmarole and Sorapiss, imposing rock formations separated by the San Vito Valley, above which the famous Corno del Doge stands isolated.

The Somadida forest in the past was defined Vizza di San Marco, and exploited by the Serenissima as a reserve of precious wood for its naval fleet, which it exploited until 1797, when it came under French rule. The area of ​​greatest interest, given its important characteristics, is the extensive forest of silver fir, spruce and beech that extends up to an altitude of 1400 meters above sea level.

Leaving the flatter area rich in thick wooded vegetation, you go up in altitude, and the spruce gives way to larch and pine forests, typical flora of a more rigid alpine climate. From a geological point of view, the territory is very complex, in fact it includes rocks belonging to different eras.

The two most important formations are the Main Dolomite which dates back to the Middle and Upper Triassic, about 220 million years ago, a sedimentary rock of lagoon environments formed mainly by dolomite mineral, and the Gray Limestones which instead are rock formations dating back to the Lower Jurassic, about 190 million years ago, consisting of oolithic sands of which they retain the whitish color or dark gray carbonate mud.

The Somadida Oriental Nature Reserve jealously hosts a rich fauna, including chamois, roe deer, deer, squirrels, dormice, foxes, stoats but also birds of prey such as the golden eagle, the peregrine falcon, the goshawk, the buzzard, the owl, the owl, owl, capercaillie, wild animals typical of the alpine habitat.