4 /5 Shanahan Matthew (Matt): A decent kids playground located alongside Narrabeen Lake and the bicycle track. There are also some picnic tables where you can sit.
There is a shaded, fenced area with some equipment for the younger kids, and some climbing ropes and other equipment outside for the older kids. There are some pretty cool rock carvings, too.
There is good parking available of up to 12 hours in the carpark, which is paid or free for Northern Beaches resident parking permit holders.
There are a few public toilets available next to the carpark, but they were grotty when we were there, albeit during the Christmas break.