Three Mile Campground is a backcountry campsite on Isle Royale National Park located 2. 7-3 miles from Rock Harbor, accessible only by ferry followed by hiking or paddling.

The campground features tent sites and shelters with excellent Lake Superior waterfront access, a dock for overnight boat tie-ups, and basic amenities including drinking water and pit toilets, making it an ideal first-night stop for paddlers and hikers arriving on the island.

Note that sites fill quickly, waterfront spots are premium, and there is a 1-night stay limit from June 1-September 17.