 The park is closed to the public as part of an ongoing policy to protect malleefowl and other threatened animals, and to assist in meeting other conservation objectives.Access is limited to educational activities by schools and colleges, and research activities which are relevant to the management of the park and compatible with conservation policies.The Mallee Cliffs National Park preserves the original clay red plains of south west New South Wales, protecting extensive areas of flat to undulating sandy red plains and linear sand dunes formed during arid periods from 350,000 to 500,000 years ago.