 Split into three distinct sections, divided by natural geography, urban development and road infrastructure, the park comprises the valley of Middle Harbour Creek and its tributaries, the slopes along
the northern side of Middle Harbour as far as and part of the catchment of Narrabeen Lakes.The park trails are popular with bushwalkers and mountain bike riders, particularly between and in an area known as Cascades after the Cascades Track that runs through the area.Others trails include the Heath Track and Bare Creek Track.