Hatterrall Ridge

Much of the northern part of the ridge is a broad whaleback, but it narrows down considerably further south, and especially near to Llanthony Priory in the Vale of Ewyas to the west of the mountain.

The ridge to the southwest ends abruptly at the sheer cliff known as the Darren below which is a considerable landslide area extending south to the hamlet of Cwmyoy with its misshapen church.

Lower parts of the ridge towards then south end are grass and heath covered, and generally drier than the high moorland.

Since much of the ridge is unfenced common land, Welsh ponies and sheep can graze over large parts of the mountain.

There are many footpaths and bridleways which cross the main path along the back of the ridge, which give access both to the Vale of Ewyas to the west and the Olchon valley to the east.

It is most obvious in the exposures created by the local landslips, where selective erosion of weak strata has destabilized the rocks above.