Lake Rotopokaka  Lake Rotopokaka is a dune lake in the Northland Region of New Zealand. It is located adjacent Tokerau Beach on the Karikari Peninsula. The lake is also known as 'Coca Cola lake' as the peat and tannins in the water give the lake a distinct ‘cola’ colour. The lake has no inflows or outflows. The surrounding catchment is a mixture of manuka scrub, pohutukawa, cabbage tree and flax. The lake is a popular recreation area and can be accessed off Ramp Road.