Hillsborough

Hillsborough, county, southern New Hampshire, U.S., bordered to the south by Massachusetts. It is a hilly upland region drained by the Merrimack, Piscataquog, and other rivers and dotted with numerous small lakes, including Franklin Pierce Lake and Powder Mill Pond. Public lands include Clough, Greenfield, Miller, and Silver Lake state parks, as well as Fox, Vincent, and Casalis state forests. Timberland is largely white pine, with stands of maple, birch, beech, spruce, and fir. The...