The Sydenham River is a river in Grey County in southern Ontario. The river flows north from a source near Williamsford, drops over the Niagara Escarpment at Inglis Falls and empties into Owen Sound harbour on Georgian Bay. It was named after Lord Sydenham, governor of Canada from 1839 to 1841. The river is obstructed by Mill Dam. At this dam is a fish ladder that allows Chinook Salmon and Rainbow Trout to complete their spawning migrations in this river. The Spey River is a tributary of this river. See also List of rivers of Ontario References External links Grey Sauble Conservation Authority Rivers of Grey County Tributaries of Georgian Bay