April 2023 - (with Gemma) Ascent from Llanfachreth. Rhobell Fawr is the site of an ancient volcano that was active during the Early Ordovician period. Despite its modest height of 734 m, it is a mountain with views of higher peaks all around, including the north face of Cadair Idris and distant Snowdon. We both loved this walk for its quiet isolation.