This area lies between Thrunton Wood and the main A697 roads which bounds it on the E side. Its location is north west of the Millstone Burn rock art site and west of Corby Crags and Caller Crags which are hidden by intervening high ground. It is effectively a poorly drained large sheep field with a few marshy streams feeding north into the Coe Burn which, further north joins the River Aln. Two Iron Age Enclosures are known on the ridge of Rimside Moor just west of the minor road, and adjacent to the main road, just north of the rock art, are another Enclosure and Settlement of undetermined age. There is no outcropping bed-rock but a large number of sandstone boulders of all sizes, several showing signs of quarrying.
The Beckensall Archive shows 5 marked boulders in this area, although even rock art enthusiasts would only get excited by two of them, Rough Castles 1 and 4. The former must have been a much larger boulder which has been cut by quarrying on two sides. The south side slice appeared to have broken when extracted and the central part removed. A series of wedge cuts have also been made from the top through the westerly face and carve straight through the main cup and ring motif. It is possible that a second ring is also present, although highly eroded. Clearly a large amount of carving has been lost both from this rock and possibly from others in the vicinity.