Monte Peso Grande
Monte Peso Grande o Castell'Ermo (1.092 m) is a mountain of the "Ligurian Prealps", the eastern section of the Ligurian Alps. Features. The mountain stands on the water divide between Arroscia (South) and Pennavaira valleys. Westwards a saddle named "Colla d'Onzo" divides it from the minor elevations of "Prati di Bacelega" and "Monte Cucco", while eastwards the ridge goes on with the E summit of Castellermo (1.062 m), goes down to the Colla di Curenna (900 m about), rises up to the Monte Nero (981 m) and ends in the lowland of Albenga. The North face of  Castellermo features rock spires and sandstone cliffs. Its southern slopes also show rocky areas, but they are not so steep and are covered in thick bushes and woodland, mainly of broad-leaf trees. On the South face of the mountain also stands, in a panoramic position and at an elevation of about 1000 metres, the tiny Catholic sanctuary of "San Calocero", built during the Middle ages. The prominence of the mountain is 345 metres. A sub-summit East of the top of the mountain bears a cross which can be seen from the lowland. Administratively the Peso Grande belongs to  the comune of Vendone; the chief town of the municipality stands in the Arroscia valley but its territory overflows the water divide and also encompasses a portion of the Pennavaira valley. SOIUSA classification. According to the SOIUSA ("International Standardized Mountain Subdivision of the Alps") the mountain can be classified in the following way: Geology. A tectonic unit, mainly made of sandstone and dolomite, takes its name from monte Castell'Ermo. Chronologically this unit it's attributed to the upper Triassic and Jurassic, while in palaeogeography it's considered as the innermost part of the Briançonnais zone, an area of the Penninic  nappes of the Alps. Close to the mountain have been found characteristic radiolarites dating back to the Jurassic. In 1904 the geologist Gaetano Rovereto, in his work "Geomorfologia delle Valli Liguri", mentioned the Castellermo for its "craggy peaks, with horrid and distinctive shapes" ("cime dirupate, orride e con forme caratteristiche"). History. The Castell'Ermo, due to its prominent location and its strong visual impact, during prehistory was considered a kind of "sacred mountain". In particolar on the slopes nowadays included in the municipality of Vendone, in a place referred as "Tre Pe", there was a dolmen presumably built by the Ligures , which unfortunately was destroyed by some youngsters of the village in the early post war years. The sacrality of the place was also recognized during the Middle ages, when was built the Sanctuary of San Calocero, which nowadays remains the destination of a pilgrimage, taking place every five years and involving many worshipers coming from the nearby villages. The same name "Castellermo", a short form of "Castello dell'Eremo" (in English "Castle of the hermitage"), is connected to an ancient tradition stating that saint Calocerus lived there as an hermit. During the years of the Resistance the area was used as  a refuge by the "partigiani". In the "Casone dei Crovi", an old building close tho the summit of mount Peso Grande, at the end of 1943 some partisans led by commander Felice Cascione composed the famous song "Fischia il vento", which was executed in public for the first time in the nearby village of Curenna. Access to the summit. Hiking. The Castellermo can be reached from San Calocero sanctuary, which can be accessed either from the East with a footpath which runs starts from Arnasco and runs close to the Arroscia/Pennavaira ridge, or from West, also following the water  divide. San Calocero can also be accessed by some villages in the comune of Vendone like Borgo di Curenna. These itineraries aren't difficult and doesn't require alpinistic skills. The round-shaped Eastern sub-summit of the Castellermo can be accessed offtrack starting from the saddle on the Arroscia/Pennavaira ridge which divides it from the main summit. Rock climbing. Although the rock is not considered of a good quality, on the North face of the mountain have been described several climbing routes. The climbers' frequentation was forbidden in the late XX century] due to the annoyance that it  caused to the nesting birds of the area.Some of these routes have been experimentally re-opened because the expert assessed they had a minor impact on the willife. Environment protection. The mountain and its surrounding area are included in the parte del SCI "(Site of Community Importance)" named "Castell'Ermo - Peso Grande" (code: IT1324818).