Thirlmere Lakes National Park was established to protect a small system of 5 perennial freshwater lakes of considerable geomorphological and biological significance – Lake Gandangarra, Lake Werri Berri, Lake Couridjah, Lake Baraba and Lake Nerrigorang. These lakes are estimated to be 15 million years old. Known collectively as the Thirlmere Lakes, the lakes and the surrounding park support a unique assemblage of terrestrial and aquatic native plants and animals, including a range of threatened species, three endangered ecological communities and one vegetation community found only in the park.
This is the second plan of management and was prepared in response to the 2011 Independent Thirlmere Lakes Inquiry which evaluated possible causes of declining water levels in the lakes.
See also: Greater Blue Mountains World Heritage Area Strategic Plan (2009).