Niobrara National Scenic River

The Niobrara National Scenic River is a section of the Niobrara River in north-central Nebraska, United States, approximately 300 miles (480 km) northwest of Omaha. In 1991, Congress set aside 76 miles (120 km) for preservation under the management of the National Park Service with assistance from the local Niobrara Council.

Source: Wikipedia — Niobrara National Scenic River (CC BY-SA 4.0)