 Coed Crafnant, an area of woodland in the valley, is managed by the North Wales Wildlife Trust.Cwm Glas Crafnant is a National Nature Reserve administered by Natural Resources Wales (formerly the Countryside Council for Wales) which lies at the head of the narrow Crafnant valley, beneath the rocky masses of Crimpiau and Craig Wen about 5 kilometres from Betws-y-Coed in Conwy.Partly surrounded by a ridge of volcanic rock, the reserve supports a range of habitats including woodland, marshland and cliffs.