The Nith River is a river located in southwestern Ontario, Canada. It flows through the regions of Waterloo and Brant, eventually joining the Grand River. The river is approximately 100 kilometers long and is known for its scenic beauty and recreational opportunities, including fishing and canoeing. The Nith River is an important part of the local ecosystem, supporting various wildlife and plant species. Its watershed plays a crucial role in the surrounding environment, providing water for agriculture and contributing to the area's natural landscape. The river is also a popular spot for outdoor activities, attracting visitors year-round.