Cadair Idris or Cader Idris is a mountain in Gwynedd, Wales, which lies at the southern end of the Snowdonia National Park near the town of Dolgellau. The peak, which is one of the most popular in Wales for walkers and hikers,[1] is composed largely of Ordovician igneous rocks, with classic glacial erosion features such as cwms, moraines, striated rocks, and roches moutonnées.
St. 678069walk through forest to old railway lines. Continue up through forest until disused quarry and climb up gully to reach summit of Tarrenhendre (634) continue along ridge though a different forest to hill of Tarren y Gesail(667) walk down to forest edge and walk along valley back to start point.
