High Rock Lake is a reservoir lake located in the Davidson and Rowan counties of North Carolina, serving as a boundary between them. It is a reservoir for hydroelectric power generation. It is the northernmost of the Uwharrie Lakes and the second largest lake in North Carolina behind Lake Norman. Its water surface covers 15,180 acres (61 km²) and there are 365 miles (587 km) of shoreline. It begins at the confluence of the Yadkin River and the South Yadkin River. The lake's name is derived from neighboring "High Rock Mountain", the tallest mountain in the Uwharrie Mountains.