As well as the rock art on the hill, Ros Castle (as the name suggests) also is the site of a prehistoric fort. The hillfort earthworks are difficult to discern, not helped by being sliced in two by a boundary wall, with a lot of heather on each side. The road runs quite close, and whilst there are a couple of steep patches, it's probably worth a detour this way for anyone heading from the Cheviots to the A1. The ground underfoot is loose sandy soil with rocky protuberances, not suitable for wheeled contrivances, and looks like it would need extra care in the wet.
The view is excellent, with the most of Bewick Moor stretching to the south, I think it's just possible to make out Old Bewick Hillfort. The vista is edged on the south east by Hepburn crags, with it's cupmarked cairns, cists, and a small hillfort. To the east, the coast is easily visible, and Bamburgh castle stands out like a sore thumb. To my minor chagrin, the long cairn at Ox eye isn't visible, though it may well have been if the trees weren't there. To the north, the lost carvings of Amerside Law also hide behind conifererous screening, with the Lammermuirs clearly visible on the horizon, I'd think it would be possible to see as far as Edin's Hall broch. To the west is the Cheviot Massif, an omnipresent silhouette, best viewed from the smaller hills to the east, such as Ros Castle.
Been back a few times but I remembered this time to look out for the Cups. StanBeckinsall's wonderful book told me the Rock Art was to be found at the base of the hill: There were a few largish rocks here, about half of them had some sort of cup marks, and although visible on the day the photos didn't come out very well!!
There are incredible views from this earthwork fort across to the Chillingham estate - with the spooky ruin of Hepburn Bastle in the foreground (the family was killed by border reivers, and the atmosphere is very eerie).