Belle Isle Park, known simply as Belle Isle, is a 982-acre island park in Detroit, Michigan, developed in the late 19th century. It consists of Belle Isle, an island in the Detroit River, as well as several surrounding islets. The U.S.-Canada border is in the channel south of Belle Isle. Owned by the city of Detroit, Belle Isle is managed as a state park by the Michigan Department of Natural Resources through a 30-year lease initiated in 2013; it was previously a city park.