The Manicouagan River is located in the province of Quebec, Canada. It is known for its unique circular shape, which is a result of the Manicouagan Reservoir, created by a meteorite impact millions of years ago. The river flows into the St. Lawrence River, contributing to the region's hydrology. The river is approximately 200 kilometers long and is a vital source of hydroelectric power. It is part of the larger Manicouagan watershed, which supports various ecosystems and wildlife. The surrounding area is popular for outdoor activities such as fishing, hiking, and camping, attracting nature enthusiasts year-round.