<Ul> <Li> Northern: The northern section runs from the Canadian province of Newfoundland and Labrador to the Hudson River . It includes the Long Range Mountains and Annieopsquotch Mountains on the island of Newfoundland, Chic - Choc Mountains and Notre Dame Range in Quebec and New Brunswick, scattered elevations and small ranges elsewhere in Nova Scotia and New Brunswick, the Longfellow Mountains in Maine, the White Mountains in New Hampshire, the Green Mountains in Vermont, and The Berkshires in Massachusetts and Connecticut . The Metacomet Ridge Mountains in Connecticut and south - central Massachusetts, although contained within the Appalachian province, is a younger system and not geologically associated with the Appalachians . The Monteregian Hills, which cross the Green Mountains in Quebec, are also unassociated with the Appalachians . </Li> <Li> Central: The central section goes from the Hudson Valley to the New River (Great Kanawha) running through Virginia and West Virginia . It comprises (excluding various minor groups) the Valley Ridges between the Allegheny Front of the Allegheny Plateau and the Great Appalachian Valley, the New York--New Jersey Highlands, the Taconic Mountains in New York, and a large portion of the Blue Ridge . </Li> <Li> Southern: The southern section runs from the New River onwards . It consists of the prolongation of the Blue Ridge, which is divided into the Western Blue Ridge (or Unaka) Front and the Eastern Blue Ridge Front, the Ridge - and - Valley Appalachians, and the Cumberland Plateau . </Li> </Ul> <Li> Northern: The northern section runs from the Canadian province of Newfoundland and Labrador to the Hudson River . It includes the Long Range Mountains and Annieopsquotch Mountains on the island of Newfoundland, Chic - Choc Mountains and Notre Dame Range in Quebec and New Brunswick, scattered elevations and small ranges elsewhere in Nova Scotia and New Brunswick, the Longfellow Mountains in Maine, the White Mountains in New Hampshire, the Green Mountains in Vermont, and The Berkshires in Massachusetts and Connecticut . The Metacomet Ridge Mountains in Connecticut and south - central Massachusetts, although contained within the Appalachian province, is a younger system and not geologically associated with the Appalachians . The Monteregian Hills, which cross the Green Mountains in Quebec, are also unassociated with the Appalachians . </Li> <Li> Central: The central section goes from the Hudson Valley to the New River (Great Kanawha) running through Virginia and West Virginia . It comprises (excluding various minor groups) the Valley Ridges between the Allegheny Front of the Allegheny Plateau and the Great Appalachian Valley, the New York--New Jersey Highlands, the Taconic Mountains in New York, and a large portion of the Blue Ridge . </Li> <Li> Southern: The southern section runs from the New River onwards . It consists of the prolongation of the Blue Ridge, which is divided into the Western Blue Ridge (or Unaka) Front and the Eastern Blue Ridge Front, the Ridge - and - Valley Appalachians, and the Cumberland Plateau . </Li>

Where do the foothills of the appalachian mountains start