Snowdon (Welsh: Yr Wyddfa, pronounced is the highest mountain in Wales, at an altitude of 1,085 metres (3,560 ft) above sea level, and the highest point in the British Isles outside Scotland. It is located in Snowdonia National Park in Gwynedd, and has been described as "probably the busiest mountain in Britain".It is designated as a national nature reserve for its rare flora and fauna.