Rideau River

The Rideau River is a river in Eastern Ontario, Canada. The river flows north from Upper Rideau Lake and empties into the Ottawa River at the Rideau Falls in Ottawa, Ontario. Its length is 146 kilometres.

As explained in a writing by Samuel de Champlain in 1613, the river was given the name "Rideau" because of the appearance of the Rideau Falls. The Anishinàbemowin name for the river is "Pasapkedjinawong", meaning "the river that passes between the rocks."The Rideau Canal, which allows travel from Ottawa to the city of Kingston, Ontario on Lake Ontario, was formed by joining the Rideau River with the Cataraqui River. The river diverges from the Canal at Hog's Back Falls in Ottawa.