What is this Down East Circle Loop?

"The Down East Circle Loop circumnavigates America’s northeastern states and Canada’s maritime provinces clockwise from New York City via the Hudson River, Erie Canal, the St. Lawrence River, Northumberland Strait, and returns from Nova Scotia and Maine on the Atlantic Coast, Buzzards Bay, and Long Island Sound.  It is about 2,500 nautical miles in length, and welcomes the well-found cruiser with sights and cultures unlike any others in the hemisphere".