Castle Pencaire is an Iron Age hillfort on the summit of Tregonning Hill. This northwest of Breage and north of the A394 off a minor road north of Tresowes Green. It is oval with two ramparts and ditches with east and west entrances. There is evidence of hut circles within the site. On the northeast of the hill are the remains of two smaller defended sites. On the hill south of Castle Pencaire is a Bronze Age Barrow.
Castle Pencaire presents spectacular views. We walked up the track beside the hill. A small black and white cat came out from a neighbouring house to greet us. The friendly cat sought a lot of attention and after being suitably petted returned home and we continued our journey to the fort. It was a cold but clear day. The surrounding views clearly demonstrated the defensive strategy identified when this site was chosen for its construction.