CADER IDRIS ("the chair of Idris"), one of the highest mountains in North Wales, ranking next to Snowdon in popular favour. It stands south of Dolgelley and the Mawddach estuary, in Merionethshire. The main core is formed by a bare ridge some 8m. long, culminating in Pen-y-Gader (2,92 7f t.) and sharply de fined by steep rock-walls, nearly i,000ft. in height, to the north. The southward slopes to the Dysynni valley are grass-grown but abrupt, while the sheer drop from the knife-edge to the dark tarn of Llyn-y-Cau backs one of the most remarkable cirques (corms) of Britain. Beyond the narrow wall, 1,000 1,200ft. in height, in the opposing cwm, lies Llyn-y-Gader. The views from the summit are specially rich and varied on the north side ; to the south-west the wide sweep of Cardigan bay is em braced. Mention of Cader Idris and its legends is frequent in Welsh literature, old and modern.