The Avon River is a small river in central Nova Scotia, Canada. A northerly flowing river, the Avon River's flow rises at an elevation of 145 metres (475 ft.) at Card and Bag Lakes on the South Mountain, a distance of approximately 29 kilometres (18 miles) southwest of the town of Windsor. Its meander length is 64 km (40 mi). At Windsor Forks the main tributary, the West Branch Avon River, adds its flow, along with that of the Southwest Branch Avon, to the Avon. The West Branch Avon River rises at an elevation of 175 metres (574 ft.) at Black River Lake. Both the flows of the Avon and the West Branch have been impeded by hydropower developments in the early twentieth century. Near the rural community of Martock, the river enters a broad glacial river valley forming a ria where it becomes t