Pontiac Lake is a man-made impoundment created in 1926 when Lime Lake was dammed in the upper Huron River watershed. Located about 7 miles west of Pontiac, Michigan, this 585-acre lake reaches depths of up to 34 feet and features numerous islands and peninsulas. The lake has a varied shoreline with wooded rolling hills, marshes, and developed residential areas. The lake bottom consists primarily of fibrous peat and other organic materials with some sand. Over 60% of the lake is relatively shallow at 5 feet or less, while approximately 20% exceeds 10 feet in depth. The Huron River flows through the lake, entering at the western end and exiting through a dam at the southeastern shore.