High Quality Content by WIKIPEDIA articles! Sleeping Bear Dunes National Lakeshore is a United States National Lakeshore located along the northwest coast of the Lower Peninsula of Michigan in Leelanau County and Benzie County. The park covers a 35 mile (60 km) stretch of Lake Michigan's eastern coastline, as well as North and South Manitou Islands. The park was established primarily for its outstanding natural features, including forests, beaches, dune formations, and ancient glacial phenomena. The Lakeshore also contains many cultural features including the 1871 South Manitou Island Lighthouse, three former Life-Saving Service/Coast Guard Stations and an extensive rural historic farm district.