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county, northern Maine, U.S. It is bordered by Quebec, Can., to the west and northwest and by New Brunswick, Can., to the north and east. The northern boundary is defined by the St. Francis and St. John rivers. The county is a hilly highland region with numerous streams and lakes. Major waterways include the Allagash, Aroostook, Big Black, Little Madawaska, Machias, and Mattawamkeag rivers. Long, Square, Eagle, Squa Pan, and Grand lakes are among the largest lakes. Privately owned North Maine Woods, Inc., manages much of the county's extensive timberland, on which thrive spruce, birch, maple, and aspen. Public lands include Aroostook State Park, Allagash Wilderness Waterway, and the Gardner-Deboulie Reserve