Thunder Bay National Marine Sanctuary
Visitor Information500 West Fletcher
Alpena, Michigan 49707
Hours: Open All Year Summer hours: 9 am - 5 pm Mon-Sun, beginning Memorial Day Weekend July & August open until 7 pm Winter hours: 10 am - 5 pm Mon-Sat, beginning second Monday in October Closed on Thanksgiving Day, Christmas Eve, Christmas Day, New Year's Eve, and New Year's Day.
National Trust for Historic Preservation Member Discount: 10% off merchandise in Museum or Gift Shop.
The Thunder Bay National Marine Sanctuary's visitor center offers over 11,000 square feet of exciting exhibits for all ages. You are invited to venture back through the Shipwreck Century. The exhibits includes life-size scale replicas of a Great Lakes schooner battling a storm and a shipwreck that visitors can explore, all without getting wet!