This is a great walk crossing the middle of Brisbane Water National Park and visiting several highlights including Rocky Ponds. Starting with a ferry trip from Brooklyn this walk follows a series of faint tracks clear tracks and management trails. There is an alternate route described in the notes as a way around the Defile Track which and be very faint. You will enjoy a wide range of panoramic views from TumblecowII ridge Rocky Ponds (Tank Creek) and an optional side trip to enjoy the view from Mount Wondabyne. The walk finishes with a walk of contrast beside the Woy Woy landfill and a road walk to Woy Woy Station. A great day out or make it an overnighter by camping overnight at Tank Creek or Mt Wondabyne.