Lake Oahe is a large reservoir located on the Missouri River in South Dakota and North Dakota. It was created by the Oahe Dam, which was completed in 1962. The lake stretches approximately 231 miles and covers an area of about 370,000 acres, making it one of the largest man-made lakes in the United States. The lake serves multiple purposes, including flood control, irrigation, and hydroelectric power generation. It is also a popular destination for recreational activities such as fishing, boating, and camping. The surrounding area is home to diverse wildlife and offers scenic views, attracting visitors year-round.