Glyder Fawr is a mountain in Snowdonia, Wales, the highest in the Glyderau at just over 1,000m. It is the fifth highest mountain in Wales.The summit lies on the ridge between Glyder Fach and Y Garn, and has views to the north, across the Ogwen Valley, of Pen yr Ole Wen and the Carneddau, and views south to the Snowdon Horseshoe. The summit plateau is very rocky, making progress slow.
Routes to the summit start at Ogwen Cottage on the shores of Llyn Idwal to the north, from Pen-y-Pass to the south, and along the Glyder ridge to the east. One of the most popular routes from Ogwen Cottage follows the shore of Llyn Idwal to the base of the famous Idwal Slabs (a popular rock climbing crag), it then makes its way out of the cwm via the steep Devil's Kitchen path, arriving at a small lake called Llyn Y Cwn.