Maramarua River

The Maramarua River is in the north-eastern part of the Waikato District of New Zealand. It is formed by the confluence of the Mangatangi River and the Ruaotehuia Stream just north of State Highway 2 between Mangatāwhiri and Maramarua. It flows through the northern part of the Whangamarino Wetland and joins the Whangamarino River shortly before that river flows into the Waikato River.

Geology
The river first formed during the Pliocene era, approximately 3 to 4 million years ago. Originally it was a westwards-flowing river, flowing towards the Tasman Sea past Pōkeno, where the modern Waikato River flows.