A place where canoes have to be carried across land.

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1698.  Our Men had a great deal of trouble; for they were oblig’d to make several Turnings to carry the Provisions and Ammunition, and the Portage was two Leagues long.—Trans. of Hennepin’s ‘America,’ p. 75. (N.E.D.)

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1821.  The canoe of Governour Cass was transported over a portage of about nine miles, to the head of the Wabash.—Mass. Spy, Oct. 10: from the Detroit Gazette, Sept. 7.

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