Thirlmere Lakes National Park encompasses 660 hectares and is located in the NSW Southern Highlands, approximately 90 kilometres south-west of Sydney and 10 kilometres from Picton. The park is adjacent to the villages of Thirlmere, Buxton and Couridjah and was established in 1972. It is part of the Warragamba Special Area which protects drinking water for Sydney, and forms part of the Greater Blue Mountains World Heritage Area.