Thousand Islands level year-round, and support at least two living trees. The Thousand Islands archipelago is located at the outlet of Lake Ontario at the head of the Saint Lawrence River. The region is bisected by the Canada–United States border and covers portions of Jefferson and St. Lawrence counties in the U.S. state of New York, in addition to parts of the United Counties of Leeds and Grenville and Frontenac County in the Canadian province of Ontario. Geologically, most of the islands are located where a branch of the Canadian Shield runs south across the river to join with the Adirondacks. The
Ten Thousand Islands or families. Some of the Ten Thousand Islands are suitable for overnight visits, as dictated by the United States Fish and Wildlife Service. Since this is a wilderness area where wind, weather and lack of fresh water can become threatening, the Wildlife Service recommends only seasoned canoeists and sea kayakers attempt the trip. Part of the archipelago lies within Everglades National Park. The following islands are officially designated camping sites: Ten Thousand Islands archipelago is among the best and last remaining dark skies sites in the Southern Florida. Most notable is Pavilion Key that lies 11 miles south of Everglades