The Berowra Valley National Park is a protected national park that is located in northern Sydney, New South Wales, Australia. The 3,884-hectare (9,600-acre) national park is situated approximately 20 kilometres (12 mi) north-west of the Sydney central business district. Located within the Sydney Basin, the park is part of the dissected Hornsby Plateau which is dominated by Hawkesbury Sandstone and predominantly covers the catchment area of Berowra Creek. A 25-kilometre (16 mi) stretch of the Great North Walk is located within the national park.