Brier Dykes is a contour fort in Hunderthwaite, County Durham, England.
Other names on the record: Briar Dykes.
It is recorded as extant, with a partial univallate and partial bivallate rampart form, surface evidence of earthen bank, and an enclosed area of 0.7 hectares.
Banks or ramparts are the remains most likely to be visible.
The topographic record places it on a spur, at 351 m, and facing southeast.
Recorded land use includes pasture.
Dating evidence is recorded for 1200–800 BC and 800–400 BC (Morphology/Earthwork/Typology). Reliability is recorded as C - Low.
A scheduled monument number is recorded (1016614).