The Thunder Bay National Marine Sanctuary offices and visitor center are located in NOAA's Great Lakes Maritime Heritage Center at :
500 W. Fletcher
Alpena, Michigan 49707
Open All Year - Free Admission
Summer hours: 9:00 am - 5:00 pm Mon-Sun, beginning Memorial Day Weekend
July & August open until 7:00 pm
Winter hours: 10:00 am - 5:00 pm Mon-Sat, beginning second Monday in October
Closed on Thanksgiving Day, Christmas Day, and New Year's Day.
Alpena, Sanctuary of the Great Lakes, is a pleasant lake front community of approximately 12,000. Founded in 1840 as a lumber town, Alpena's various industries from timber to concrete have defined its landscapes and character. Today, Alpena is a town with many cultural and recreational opportunities.
Sanctuary staff actively promotes uses of the resources that are compatible with resource protection; in fact, all national marine sanctuaries promote multiple uses. Access to sanctuary shipwrecks is not restricted. The range of depth of the shipwrecks appeals to a variety of diver skill levels and also promises recreational opportunities for non-divers. The shallower wrecks can be viewed by snorkelers, kayakers, and boaters.
Explore Your Sanctuary
Great Lakes Maritime Heritage Center Brochure
www.us23heritageroute.org (Discover "Heritage Route 23")
www.alpena.mi.us (City of Alpena)
www.michigan.org/city/alpena (Pure Michigan - Alpena page)
www.alpenacvb.com (Alpena Convention and Visitor's Bureau)