Presque Isle ("almost an island") is a forested basalt peninsula that juts into Lake Superior at the northern edge of Marquette. A single one-way road loops around the perimeter, passing the famous Black Rocks — sea cliffs that locals have been jumping off into the cold lake water for generations — along with quiet beaches, dramatic overlooks, and groves of old-growth hemlock and white pine.
A network of walking trails crisscrosses the interior. In summer it's the default destination for any Marquette weekend; in winter the road is closed to cars but stays open for snowshoers and skiers. Free, open year-round, and arguably the single best reason to stop in Marquette.