It is the northern end of a granite ridge.[9] There are at least three rocking stones (logan stone) on the ridge.
There is a prehistoric hill fort and a stone hut circle settlement on the site.[10]
There is evidence of walls constructed in Neolithic period, around 6,000 years ago, as well as some level platforms, thought to be house sites, one platform has a network of postholes. There is also remains of a field system. These are similar to those at Carn Brea and limited excavation was carried out by Roger Mercer.[9]
There is a second Logan stone in the highest pile beside the trig point (triangulation point). A third logan stone is further down the ridge to the south, outside the reserve.