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
McCalls Dam State Park McCalls Dam State Park McCalls Dam State Park is a Pennsylvania state park on in Miles Township, Centre County, Pennsylvania in the United States. The park is in the easternmost tip of Centre County, south of Clinton County and north of Union County. McCalls Dam State Park is in a remote location on a gravel road between R. B. Winter State Park on Pennsylvania Route 192 and Eastville on Pennsylvania Route 880. The park can only be accessed in the winter months by snowmobiling or cross-country skiing. McCalls Dam State Park has a small camping area and a small picnic