 Most of the island, approximately , is state land owned by the state of Michigan.The island hosts a rare environment known as alvar, a grassy limestone plain found only in a few places worldwide.Drummond Island Township is one of only seven municipalities in the state of Michigan to consist entirely of islands, including Grosse Ile Township, St. James Township, Bois Blanc Township, Mackinac Island, Peaine Township, and Sugar Island Township.