Geography
The portage, 80 rods (about 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. 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 boundaries with the United States run 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.
Read more about this topic: Height Of Land Portage
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