Grinton-Fremington Dyke System
Description

Grinton-Fremington Dyke System MYD4514 (c) YDNPA, 2023
The system of large linear dykes centred on Grinton and Fremington in Swaledale formed part of the boundary of an early, post-Roman, British political area or kingdom. The core of this system consists of two massive parallel banks lying about 500 metres apart, with ditches on their eastern sides. A third, somewhat smaller dyke lies 2.5 km to the east. On the moorland above Grinton are two more. As a whole the system seems to block access into Upper Swaledale and Arkengarthdale from the east.
The dykes cut Romano-British features but are ignored by the layout of the early Medieval township at Fremington and so have been dated to the period in between, in other words, the fifth, sixth or early seventh century AD.
Source:
Fleming, A (1994) ‘Swadal, Swar (and Erechwydd?): early medieval polities in Upper Swaledale’ Landscape History. Vol 16 pp17-30
White, Robert (2002) The Yorkshire Dales. A Landscape Through Time. Ilkley: Great Northern Books