Under the Mackinac Bridge to St. Helena: A Four‑Hour Lighthouse Cruise

St. Helena Island sits in the western Straits of Mackinac, a low rocky outcrop a few miles from Mackinaw City and the mainland town of Cheboygan, Michigan. The St. Helena Island Tour departs aboard OLIVE, a 24-foot Parker offshore boat, for a four-hour round trip that sails beneath the Mackinac Bridge, circles the island, and offers two hours ashore to explore the lighthouse grounds and, if you opt in, climb the tower. The small-group format—maximum six passengers—changes the rhythm of a typical boat cruise. Instead of a crowded ferry, OLIVE gives you room on deck for sweeping photos of suspension cables, open water, and the island’s weathered shore. St. Helena’s lighthouse, a working 19th-century structure, is set against low, glaciated bedrock and cobble that bear the fingerprints of the last ice age. Patches of hardy prairie grasses and stunted shrubs cling to the lee side, and migratory waterfowl and gulls use the island as a stopover during spring and fall. Onshore, you'll step off onto a rugged shoreline and walk the compact grounds around the light. The interior tour and tower climb are offered as an add-on; climbing the spiral stair yields a raw, mechanical view of the light’s lantern room and a broad panorama of the straits. Guides typically allow two hours on the island—enough time to explore, photograph, and linger without feeling rushed. Practical details matter here. The operator requires a contact number that can receive texts and will send parking instructions after booking; plan to park a short distance from the marina and bring only what fits in a backpack or similar small bag. Drones are allowed but flown at your own risk. The outing is appropriate for guests ages 12 and up and moves at an easy, unhurried pace, but expect bosun-style motion crossing open water and occasional spray on cool days. Why book this trip? For photographers, history buffs, and people who prefer intimate, expert-led outings, the St. Helena Island Tour compresses the best parts of Straits country into one accessible morning or afternoon. You get the thrill of sailing under the Mackinac Bridge, close encounters with a remote Great Lakes lighthouse, and time to learn about local maritime history without the logistics of arranging your own boat. For many visitors, the island’s wind-tumbled silhouette and the vista from the tower are what linger longest after the trip ends. Booking is handled through the operator’s FareHarbor page; expect clear pre-trip communications and concise parking directions. Because groups are small, reserve early during summer and holiday weekends. Whether you come for a short nature escape or a deeper look at Great Lakes navigation, this compact, hands-on island visit delivers an authentic local experience. Book early today.