The Mary Cairncross Reserve is a conservation park located on the Blackall Range east of Maleny, in the Sunshine Coast Region, Queensland, Australia.
The Glass House Mountains were formed thousands of years ago when the outer layer of soil and rock eroded from the extinct volcanic summit.
Sunshine Coast Regional Council manages and maintains the reserve along with the volunteers that staff the Thynne Natural History Education Centre daily.
The Cairncross reserve has an area of 530,000 square metres and reaches a peak canopy of 440 m. The main species of tree is the Australian red cedar.
[2] The Mary Cairncross Scenic Reserve Discovery Centre building was opened in 2017 by the Governor of Queensland, Paul de Jersey AC.