This is our first full guide to North Wales Slate and covers the amazing quarries near Llanberis famous for their technical run-out slabs and, more recently, for the wealth of sport climbing. It is also famous for the bizarre and spectacular rock formations that give a unique climbing environment. We have covered 'the slate' before in North Wales Climbs but this is a selective guide. This time we are covering everything - that includes all the classics of course but also a few routes that you probably wouldn't want to repeat!