The New River, also Rio Nuevo, is a river in northern Belize. As the longest river that is entirely confined to Belize, it drains primarily the eastern part of the Orange Walk District during its north-northeasterly course and empties into the Chetumal Bay. The river forms also the New River Lagoon, the largest body of fresh water in Belize, just east to the Maya temples of Lamanai. The New River is a habitat to numerous types of fish, birds, as well as to crocodiles.