Northern boundary of Massachusetts

The northern boundary of the U.S. state of Massachusetts adjoins two other states: Vermont and New Hampshire. The majority of the boundary is roughly a straight line from the northwest corner of the state (42°44′44.7″N 73°15′54.13″W NAD27) east to a point in Dracut, just north of Lowell. East of that point, the border is a series of line segments about 3 miles (5 km) north of the curving Merrimack River, ending in the Atlantic Ocean.