The Green Mountains are a mountain range in the U.S. state of Vermont and are a subrange of the Appalachian Mountains. The range runs primarily south to north and extends approximately 250 miles from the border with Massachusetts to the border with Quebec, Canada. The part of the same range that is in Massachusetts and Connecticut is known as The Berkshires or the Berkshire Hills and the Quebec portion is called the Sutton Mountains, or Monts Sutton in French.