The Rideau River is a scenic waterway located in eastern Ontario, Canada. It flows approximately 146 kilometers from Rideau Lake to the Ottawa River, passing through several towns, including Smiths Falls and Ottawa. The river is known for its beautiful landscapes and recreational opportunities, such as boating, fishing, and kayaking. The Rideau River is part of the Rideau Canal, a UNESCO World Heritage Site that connects to the Ottawa River. The canal was originally built for military and trade purposes in the early 19th century. Today, it serves as a popular destination for tourists and locals alike, especially during the summer months.