 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 () a short distance to its east, and Swamp (or Monument) Portage () to the west in the BWCA and Quetico Provincial Park.The Height of Land Portage may have had its origin as a route for foraging or migrating animals.