The slate quarries near Llanberis have developed into a popular climbing spot, thanks to the slate boom of the 1980s. The area became famous for immaculate slabs of purple slate with bold run-out routes. These routes have become sought-after classics, and still remain in their original style. In recent years, the area has been developed to boast a multitude of super sport routes from short single pitches to huge multi-pitch extravaganzas. This is a comprehensive guidebook – and a celebration of all styles of slate climbing.