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Height of Land Portage is a portage along the historic Boundary Waters route between Canada and the United States. Located at the border of the Canadian province of Ontario and the U.S. state of Minnesota, the path is a relatively easy crossing of the Laurentian Divide separating the watersheds of the Atlantic and Arctic oceans. It was used for centuries for canoe travel by the First Nations, and the historic route of which it was a part became a preindustrial thoroughfare giving the Voyageurs and Coureurs des bois access to the fur trading posts in western Canada. For many years the portage was part of an important route from Lower Canada to the interior of the North American continent. It became part of the boundary between British North America and the United States following the American Revolution and treaties delineating the border. In recognition of this history, the portage is on the U.S. National Register of Historic Places, and is a Minnesota State Historic Site. Located in La Verendrye Provincial Park and the Boundary Waters Canoe Area Wilderness in the unspoiled country along the international boundary, the portage retains its traditional use, but for recreational canoe trips rather than commerce. == Geography == The portage, 80 rods (0.25 miles, or 402 m) long, crosses a low saddle between North Lake and South Lake in the Rove Formation. It adjoins the boundary vista, a cleared strip which marks the Canada – United States border between those lakes.〔. Photographs of boundary vista and illegal snowmobile use of adjacent portage trail, from report prepared for Izaak Walton League of America, Sierra Club North Star Chapter, Northeastern Minnesotans for Wilderness, and Wilderness Watch.〕 South Lake is the source of the Arrow River, tributary to the Pigeon River, which flows east to Lake Superior, other Great Lakes, and the St. Lawrence River to the Atlantic Ocean. North Lake is in the watershed of the Rainy River, which drains by way of the Winnipeg and Nelson Rivers to Hudson Bay. According to the Canada/US International Boundary Commission, Ontario's boundary with the United States runs 2700 kilometers on water and only about one kilometer on land. The 80-rod Height of Land Portage is a significant part of the land border; the remainder is along two other portages, ''Watap Portage'' (100 rods) a short distance to its east, and ''Swamp'' (or ''Monument'') ''Portage'' (~ 72–80 rods) to the west in the BWCA and Quetico Provincial Park. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Height of Land Portage」の詳細全文を読む スポンサード リンク
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