Ku-ring-gai Chase NP's undiscovered bits #3: Cockle Creek & its tunnel

It's a few hundred metres south of the Banksy tunnel, which carries Golf Course Creek. (See: Banksy Tunnel) This one carries Cockle Creek, as well as the odd adventurous bushwalker commuting between Wahroonga and Asquith.

It's accessed from near Mills Park in Asquith, or from a side track off the Gibberagong Track near its North Wahroonga start.