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Climbing was pioneered on the cliffs in this valley, and new frontiers of difficulty were explored. Today it has many friendly beginner and novice multipitch routes, that lead you right up into the mountains of the Glyders. Don't be expecting an easy ride though as there are some classic routes across the grades here.
There is simply masses of rock in this valley, and nearly all of it is covered in routes. Whilst the greatest concentration of routes is around Llyn Idwal and Tryfan, the climbing extends beyond there towards Capel Curig and the neighbouring valley. The crags included are: