Lake Oahe Lake Oahe Lake Oahe (oh-WAH'-hee) is a large reservoir behind Oahe Dam on the Missouri River; it begins in central South Dakota and continues north into North Dakota in the United States. The lake has an area of and a maximum depth of . By volume, it is the fourth-largest reservoir in the US. Lake Oahe has a length of approximately and has a shoreline of . 51 recreation areas are located along Lake Oahe, and 1.5 million people visit the reservoir every year. The lake is named for the 1874 Oahe Indian Mission. Lake Oahe begins just north of
Leasburg Dam State Park Leasburg Dam State Park Leasburg Dam State Park is a state park of New Mexico, United States, located on the Rio Grande. It provides opportunities for camping, hiking, picnicking, swimming, and wildlife viewing. Nearby is the historic Fort Seldon State Monument, and to the south is the city of Las Cruces. The dam at Leasburg was completed in 1908. Its purpose is not to hold back the flow of the river, but instead to divert it into a system of canals for use by nearby farms. Known for its rich history, early settlers used the area as a passage to