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.
Did Sub Cneifon Ridge and Cneifon Arete. Continued up Y Gribin onto Glyder Fach and then descended under Twll Ddu
