Discover Fathom Five's underwater treasures and rugged island beauty.
Discover the most magical spots to pitch your tent or park your rig on your next Fathom Five National Marine Park adventure.
Dolomite, 420 million years old, rises through the sparkling waters of Lake Huron to form Fathom Five National Marine Park. This is a freshwater ecosystem of ancient rock formations, cliff-edge forests, fascinating dive sites on 22 shipwrecks, and orchid species both plentiful and rare. Visit for a day or backcountry camp on starry-skied Flowerpot Island—Fathom Five is equal parts mystery and recreation, ecology and culture—and a welcoming escape to nature.
The best time to visit Fathom Five National Marine Park is during the summer months when the weather is warm and the waters are ideal for diving. However, this is also the busiest season. For a quieter experience, consider the shoulder seasons of late spring or early fall. The park's visitor centre is open daily from 9am to 5pm, except on certain holidays.