Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Clark Township is a civil township of Mackinac County in the U.S. state of Michigan. As of the 2000 census, the township population was 2,200.Cedarville is an unincorporated community at the junction of M-129 and M-134 north of the Les Cheneaux Islands, about two miles east of Hessel, and about 35 miles due south of Sault Ste. Marie at 45°59 53 N 84°21 47 W / 45.99806°N 84.36306°W / 45.99806; -84.36306 It began as a lumber settlement on the Lake Huron shore in 1884. A post office was established in July 1888. The ZIP code of 49719 serves most of Clark Township and a portion of eastern Marquette Township. The Les Cheneaux Historical Association runs the Historical Museum and the Maritime Museum, both in Cedarville.