Rainy Lake is a large body of water located on the border between the United States and Canada. It spans approximately 360 square miles and is known for its clear waters and numerous islands. The lake is part of the Rainy Lake National Park and is popular for recreational activities such as fishing, boating, and kayaking. The lake is fed by several rivers and streams, including the Rainy River, which connects it to the Lake of the Woods. Rainy Lake is home to diverse wildlife, including various fish species, birds, and mammals, making it an important ecological area for both countries.