Mulligans Flat Nature Reserve is a 984-hectare woodland protected area in north-eastern Canberra. The reserve adjoins Goorooyarroo Nature Reserve to the south, and together these form a contiguous protected area extending across more than 18 km² of woodland.
Mulligans Flat Nature Reserve protects part of a large expanse of critically endangered Yellow Box–Blakely's Red Gum Grassy Woodland in the northern ACT, providing important habitat and enabling wildlife movement through to the Majura Valley, the Molonglo River valley and into NSW.
Together with Goorooyarroo Nature Reserve, this reserve is a key part of a woodland research site of international importance managed in partnership by the Woodlands and Wetlands Trust, the Australian National University (ANU) and the ACT Government.
Mulligans Flat Nature Reserve also forms a crucial section of the 1,286-hectare, predator-proof wildlife enclosure known as Mulligans Flat Woodland Sanctuary and managed by the Woodlands and Wetlands Trust. The Trust has led the re-introduction of a number of woodland fauna, long lost from the Canberra environment including Eastern Quoll (Dasyurus viverrinus), Eastern Bettong (Bettongia gaimardi), and Bush Stone-Curlew (Burhinus grallarius).
In 2019, an 801-hectare extension to the Sanctuary was created, extending the existing fence southward to include most of the adjoining Goorooyarroo Nature Reserve as well as a further section of Mulligans Flat Nature Reserve.
Mulligans Flat Woodland Sanctuary offers regular guided activities for visitors.
The National Trail traverses the smaller, northern section of the reserve known as 'little Mulligans', paralleling Mulligans Flat Road on its northern side.
Horses are permitted on marked equestrian trails only.
Cycling is permitted only on management trails including the Centenary Trail.
No dogs allowed.
