Nahanni National Park Reserve (nəhănˈē) [key], c.1,840 sq mi (4,766 sq km), Northwest Territories, Canada, W of Fort Simpson; est. 1972. Located just E of the Yukon border, the park extends along the lower portion of the South Nahanni River. The river's spectacular course passes through three deep canyons and over Virginia Falls (c.300 ft/90 m high) and numerous rapids. A wilderness area, the park has hot springs and caves and a variety of plant and animal life.