View of Snowdon base from lay by next to A4086

snowdon spring snowdonia national park snowdon fog snowdonia snowdon cromlech boulders welsh valley pen y pass gwynedd north wales national park highest mountain pyg wales welsh countryside mountain mountainside valley poor conditions rural hiking countryside foggy adventure fog flowing river wall stone wall outdoors nature pig track cloudy uk flowing lake a4086 travel outside water activity tourism climb wet green river holiday day time lay by tourists