Nod Parc Cenedlaethol yw gwarchod a gwella harddwch naturiol, bywyd gwyllt a threftadaeth ddiwylliannol yr ardal; hyrwyddo cyfleoedd i ddeall a mwynhau ei nodweddion arbennig; a meithrin lles economaidd a chymdeithasol ei chymunedau. The National Park’s aims are to conserve and enhance the natural beauty, wildlife and cultural heritage of the area, promote opportunities to understand and enjoy its special qualities; and to foster the economic and social well-being of its communities.