The Rainy River is a river located in North America, primarily flowing through the states of Minnesota and Wisconsin, as well as parts of Canada. It serves as a natural border between the United States and Canada, connecting Rainy Lake to the Rainy Lake of the Rainy River system. The river is approximately 85 miles long and is known for its scenic beauty and recreational opportunities, including fishing and boating. The Rainy River is part of the larger Rainy Lake watershed, which is significant for its diverse ecosystems and wildlife. The river is also historically important, as it was a key route for Indigenous peoples and later European explorers. Today, it remains a popular destination for outdoor enthusiasts and is recognized for its ecological value.