The Nith River is a scenic tributary of the Grand River system in southwestern Ontario, Canada, winding through a predominantly rural landscape and passing through charming towns such as New Hamburg, Ayr, and Paris before joining the Grand River at Paris. The river corridor is characterized by agricultural and forested lands, offering anglers a diverse and productive fishery that ranges from cold-water trout habitat to warm-water bass and pike territory. As part of the Grand River watershed managed by the Grand River Conservation Authority (GRCA), the Nith supports a healthy mix of resident and migratory fish species, making it a worthwhile destination for fly anglers, spin fishers, and those chasing seasonal runs alike.