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 Jornada del Muerto, the nearby site of a 19th-century army outpost is a reminder of a time not too long ago. Leasburg Dam State Park offers year-round camping, picnicking, and birdwatching. From about mid-March to mid-October the park is also a venue for fishing, canoeing, and kayaking in the Rio Grande. The dam channels water from the Rio Grande for irrigation in the Mesilla Valley. Nearby a museum and a number of trails are located near Fort Seldon State Monument. Leasburg Dam State Park Leasburg Dam State Park is a state park of New Mexico, United States, located on the