Grimsbury Castle

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Grimsbury Castle
Grimsbury Castle, Iron Age Hill Fort - - 886.jpg
View of the eastern side
Grimsbury Castle is located in Berkshire
Grimsbury Castle
Location within Berkshire
General information
Architectural styleIron Age Hill Fort
Coordinates51°26′50″N 1°15′58″W / 51.447322°N 1.266036°W / 51.447322; -1.266036Coordinates: 51°26′50″N 1°15′58″W / 51.447322°N 1.266036°W / 51.447322; -1.266036

Grimsbury Castle is an Iron Age "multiple enclosure" Hill Fort comprising a large circular encampment situated on a high hill. It is situated within Grimsbury Wood to the between Cold Ash and Hermitage, in the county of Berkshire.


Plan of Grimsbury Castle

The site benefits from a natural spring which reportedly has never been known to run dry. The entrenchment would appear to have been extended on the south side of the hill for the purpose of enclosing this spring. This rampart appears to have had only two entrances, one on the north and the other on the south side; just within the entrenchment, at the entrance on the north, is a small tumulus, which may have been constructed as a mount for observation or defense, or for the purpose of interment.[1]

The name shows that the later Saxon settlers in the region found the earthworks so impressive that they thought they must have been built by the chief of their gods, Woden alias Grim.[2]

The site lies at an elevation of 155m AOD. There is an 18th-century folly on the site, also known as Grimsbury Castle.

Today the site is crossed by a small, single-track roadway.


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