Parking is not easy on the busy B4461 but I managed to park next to the Thornbury turn off.
There is a public footpath sign and stile giving access to the woods in which the Hillfort sits. Up the steep and narrow 'path' you shortly come to the remains of the ditch / rampart. There is now a 'sculptured walk' running along the ditch. Standing in the ditch the ramparts are well over head height. No views to be seen due to the trees. Not a lot to recommend a visit I'm afraid.