The high Ligurian Trebbia Valley is  part of the High Trebbia Valley Mountainous Community and it is formed by eight Communes: Torriglia, Rondanina, Propata, Fascia, Montebruno, Rovegno, Fontanigorda and Gorreto.
The valley is crossed by the Trebbia river, one of the cleanest rivers in Italy and it is the most isolated and solitary Ligurian valley, characteristic which has contributed to save priceless environmental features such as  wide quietly woods and cryshighine waters of streams.
The Trebbia river basin which is born from the Mount Prelà (1406 mt above sea level )  is situated over the Appennine watershed and flows into the Po River after about 118 km. Developing from east to west parallel to the coastal arc, it constitutes the main axis of the complex mountain system of  Liguria.
The high valley shows a typical mountainous environment from the springs to Bobbio: human settlements are rare and concentrated in compact nucleuses and the economy developed on steep and terraced slopes.
The high valley is one of the most picturesque of the Ligurian mountains, it is tortuous and narrow, often among steep and woody slopes, with remarkable cliffs and vast and verdant  valleys .
The total lack of industrial areas in the high valley make the Trebbia one of the few rivers  with no pollution.

The territory is located among Gorreto (mt. 522 on sea level) and the Mount Antola (mt. 1597).
The uneven morphology contributes to determine the climatic features of the habitat, also conditioned by winds and heavy rains, mainly in spring and in autumn, due to the contrast between  warm winds coming from the sea and  cold winds going downwards from  north. The relative damp, changeable at different heights, take shapes in the fog along river courses , especially at night and at dawn. Once the fog was completely unknown, today it is due to water evaporation picked up from the Brugneto basin and to the state of abandonment in which woods and pastures have been left.
Layers of leaves and broken branches and the growth of bushes have increased the air damp favouring condensation in proximity of the ground.
Below 800 metres the wooded area is almost exclusively made of chestnut woods and  mixed wood, but lately many chestnut trees have been replaced by plantations of conifers which can find good habitat conditions here and which are economically more productive. On higher grounds one can find beech trees, maples, white firs and oaks while pastures are in complete abandonment.
The progressive and inexorable cessation of  agricultural activities by the resident population, the lack of fruit harvests, with the consequent abandonment of  woods and deterioration of plants which have empty trunks and broken branches,  have favoured the gerbido growth, bushes of ferns, junipers,  cornels and brooms that often block the access to woods once perfectly praticable. Despite abandonment, the Trebbia Valley remains a territory with a remarkable vegetation,  uncontaminated air and marvellous woods.
This valley is one of the most picturesque of the Ligurian mountains, located among steep and woody ridges, disclosed on dizzy cliffs and green areas.
While not populated in winter, the valley  becomes crowded in Summer offering extraordinary possibilities either for relaxing or for various activities.
Wide spaces for any kind of sport are available.
Excursionists will find mountain paths with beautiful landscapes, suitable both for beginners and advanced walkers ; the river and the numerous tributaries offer resources to  fishermen , also it is suitable for canoe training with its reckless descents among impressive meanders.
One can have beautiful walks in the green departing from the historical centre and from small rural villages, where dumping into valuable country architectures, mule tracks, dry walls, fountains and farmsteads is still possible.
The  Trebbia valley seems to be made by mother nature to offer relief, ample and calm spaces to whom is besieged by daily neuroses and looks for quiet and silence.
Nevertheless the valley is exposed to the risk of future depopulation, especially in inner zones; many villages in winter are already uninhabited. Depopulation causes the loss of cultural identity and the consequent degrade of the habitat, unrepeatable in certain aspects, such as in rural houses and woods.
Lately, thanks to the fundation of the Mount Antola Regional Park, we have been had some small positive signals , but there is still a lot of work to do to promote the return of young people to the valley, giving them job opportunities also in the fields of  habitat care,  tourism, agriculture and pastures.