South Manitou Island is located in Lake Michigan, approximately 16mi west of Leland, Michigan. It is part of Leelanau County and the Sleeping Bear Dunes National Lakeshore. The uninhabited island is 8.277sqmi in land area and can be accessed by a ferry service from Leland. Guided tours on open-air vehicles are available to visitors, but most traffic is on foot. Larger North Manitou Island lies to its north. The island is 3mi wide and 3mi long. It is part of an island chain that extends north to the Straits of Mackinac. The island consists of a ridge of tilted layers of limestone, buried under a blanket of glacial debris. Glaciers carved out the Lake Michigan basin. When the basin filled with water, the peaks of the ridge remained exposed as islands. During post-glacial times, winds blowing on the high, sandy bluffs on the west side of the island moved sand inland, forming sand dunes. Florence Lake is the island's only inland lake. The island has a system of trails and campsites. A growth of Northern white cedars on the southwestern corner of the island are among the oldest and largest in the world. The largest is 18ft around and is estimated to be over 500 years old.
