Twin Lakes is a pair of glacier-carved alpine lakes about 15 miles south of historic Leadville, Colorado. They are downstream along the Arkansas River, whose headwaters are by Leadville. The lakes, however, are on a tributary, Lake Creek, which joins the Arkansas just below the lakes. After dredging, the lakes now have a surface area of 2,700 acres, and they serve as a reservoir to store water for use in the Front Range. Both east and west lakes are recreation areas for boating and fishing.