The Blue Mountains National Park is a protected national park that is located in the Blue Mountains region of New South Wales, in eastern Australia. The 267,954-hectare (662,130-acre) national park is situated approximately 80 kilometres (50 mi) west of Sydney, and the park boundary is quite irregular as it is broken up by roads, urban areas and inholdings. Despite the name 'mountains', the area is an uplifted plateau, dissected by a number of larger rivers.