The Glyderau (a Welsh plural form, also known in English as the Glyders) are a mountain group in Snowdonia, North Wales. The name derives from the highest peaks in the range, Glyder Fawr and Glyder Fach. According to Sir Ifor Williams, the word "Glyder" derives from the Welsh word "Cludair", meaning a heap of stones.
From the parking for Marchlyn Bach reservoir above Deniolen, we took the main North spur of Elidir Fach up on to the horse shoe. Continuing to Elidir Fawr, Mynydd Perfedd and finally Carnedd y Filiast before heading straight down to the reservoir and back along the road to the parking
