In common with most of the range, the terrain is characterised by hard sedimentary rock covered with heather, making progress on foot difficult.
Gwrgan Fawr | Fforest Fawr | Rhinog Fawr | Llyn Arenig Fawr |
The Rhinogydd are notably rocky and heather-clad towards the northern end of the range, especially around Rhinog Fawr, Rhinog Fach and towards Moel Ysgyfarnogod.