The Doubtful River is a river located in the Fiordland region of New Zealand. It flows through a remote and scenic area, characterized by steep mountains and lush forests. The river is known for its clear waters and is a popular spot for kayaking and fishing. The river's name reflects the uncertainty of early explorers about its navigability. It is part of the Doubtful Sound area, which is renowned for its stunning natural beauty and diverse wildlife. The Doubtful River contributes to the unique ecosystem of the region, supporting various plant and animal species.