The Rotoiti River is located in the South Island of New Zealand, flowing from Lake Rotoiti into the Waiau River. It is known for its clear waters and scenic surroundings, making it a popular spot for fishing and kayaking. The river is part of the Nelson Lakes National Park, which features stunning landscapes and diverse wildlife. The Rotoiti River contributes to the region's ecosystem and is an important habitat for various fish species, including rainbow trout and brown trout.