Mar Lodge Estate is a highland estate in western Aberdeenshire, Scotland, which has been owned and managed by the National Trust for Scotland (NTS) since 1995. Its principal building, Mar Lodge, is about 4 miles (6.4 km) west of the village of Braemar. The estate is recognised as one of the most important nature conservation landscapes in the British Isles and occupies nearly 8% of the Cairngorms National Park, covering 29,340 hectares (72,500 acres). The natural heritage value of the estate is reflected by the fact that much of it is designated as a Site of Special Scientific Interest (SSSI), a Special Area of Conservation (SAC) and a Special Protection Area (SPA). The entire estate has been classified as a national nature reserve since May 2017, and is designated a Category II protected area by the International Union for Conservation of Nature.
Extreme weather conditions are experienced across the estate, especially on the plateau. Landslides, avalanches and floods alter the landscape and give it an interesting geomorphology. The estate is characterised by rounded granite Cairngorm mountains to the north, with deep corries and crags down to the valley floor. Spectacular glacial breaches include the Lairig Ghru and Lairig an Laoigh. To the south west are the more open, rolling hills of the Geldie. Waters flowing from the mountains become the headwaters of the River Dee.
