Thompson's Harbor State Park is a remote and largely undeveloped public recreation area on Lake Huron covering 5,109 acres (2,068 ha) in Presque Isle County, Michigan. The state park's seven point five miles (12.1 km) 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. The park offers six miles (9.7 km) of trails for hikers and cross-country skiers, rustic cabins, and opportunities for sea kayaking. The park was designated a Michigan "dark sky preserve" in 2016.