Thompson's Harbor State Park is a remote and largely undeveloped public recreation area on Lake Huron covering 5,109 acres in Presque Isle County, Michigan. The state park's seven point five miles of pristine shoreline encompass a varying terrain of second growth forest, limestone cobble beaches, and deep sand dunes. The park's flora and fauna include a large population of dwarf lake iris as well as more than one hundred bird species, coyotes, deer, and possibly black bear.