The Buller River, known as Kawatiri in Māori, is a premier fishing destination on New Zealand's South Island, flowing 177 kilometers from its source at Lake Rotoiti in the Southern Alps to the Tasman Sea near Westport. This river is celebrated for its outstanding wild and scenic characteristics, protected by a Water Conservation Order, and offers diverse angling experiences across its length. It experiences the largest flood flows of any river in the country, yet remains free-flowing and undammed throughout its course. The river transitions from a fast, turbulent stream in its upper reaches to a wide, expansive waterway downstream, with its numerous tributaries becoming key focuses for fly fishers. The middle and upper sections are particularly prized for their clear water, beautiful runs and pools, and spectacular, varied scenery.