Lake Ontario
National Marine Sanctuary

Designated in 2024, Lake Ontario National Marine Sanctuary is a historically rich area where the long interactions between human activity and the maritime environment has fostered a deep sense of meaning and place. The lake shores and bottomlands of Lake Ontario offer an intriguing window into the history of this special area. The first regional inhabitants, the ancestors of the Haudenosaunee Confederacy, populated the area thousands of years ago. As the gateway between the Great Lakes and the ocean, the maritime landscape of this area represents connections between cultures, between a nascent nation and the frontier, and of commerce, opportunity, and ingenuity. The cultural legacy of people who lived along its shores and journeyed across its waters is showcased by the remains left behind and the stories passed down. Forgotten shipwrecks and archaeological resources, hidden in these cold fresh waters, are among the best preserved in the world, offering a chance to learn, share, and connect to the past.