The Munghorn Gap Nature Reserve is a protected nature reserve that is located in the Central Tablelands region of New South Wales, in eastern Australia. The 5,934-hectare (14,660-acre) reserve is situated on the Great Dividing Range, 35 kilometres (22 mi) north-east of Mudgee. The Castle Rocks walking trail reveals pagoda-like sandstone formations. The average elevation of the terrain is 569 meters.