It straddles the boundary of the unitary areas of Caerphilly and Blaenau Gwent.
The broad-topped ridge runs northwest to southeast and achieves a summit height of 486 metres (1,594 ft) above sea-level, at a point crowned by a trig point at OS grid ref SO 145060.
The entire hill is composed of sandstones and mudstones dating from the Carboniferous Period.
A minor public road runs along the western edge of the plateau.
All of the land to its east has been mapped as open country under the CRoW Act thus giving a right of access to walkers.