Largin Castle is a contour hillfort and scheduled monument in Cornwall, England, presumed to date from the Iron Age.
Largin Castle is situated approximately west of Dobwalls, on a hill spur above the north-facing southern slope of the Fowey valley, at an elevation of above sea level. It is described in the Atlas of Hillforts of Britain and Ireland as having a complex shape occupying an area of . The hillfort has an outer rampart and ditch enclosure with an entrance at its south. Within this, a smaller inner oval enclosure, also defined by ramparts and ditch, is offset to the north and occupies some 3/4 of the interior. To the north and east of the hillfort, the valley drops away steeply to the Fowey and to a tributary stream, both at circa elevation; to the south-west the land rises slowly to a local maximum of at a distance of . A linear earthwork thought to be associated with the hillfort is found at the south-west, at the contour, running for approximately first due north, and then north-north-west.[1] [2]
The castle enclosure is overgrown by an ancient oak woodland; coniferous planting surrounds the site. The Atlas of Hillforts specifies the condition of the site as good.[3] [1]
Largin Castle was listed as a Scheduled Monument in June 2020.