Pilliga Nature Reserve is rich in landforms, geomorphological features and diverse soil types and provides a large unpolluted catchment contributing to the Namoi and Castlereagh river systems.
The plants in the park are representative of those found in the area known as the Pilliga Scrub, although not all plant communities of the Pilliga Scrub are protected in the park. The park provides habitat for a wide range of native plants and animals, including 32 threatened species.
This plan of management was originally adopted by the Minister for the Environment on 26 May 2003. It was amended in accordance with the NSW National Parks and Wildlife Act 1974 on 28 July 2015. These amendments are incorporated into this plan.