A natural extension to your trip in the Hudson Valley is to head south to New York City presuming you didn't start there, which is easily accessible by public transportation and by private automobile. But also consider heading north into the Adirondacks, a mountain range in northeastern New York and the location of the Adirondack State Park, the largest state park in the continental United States. Amtrak's (http://www.amtrak.com) Adirondack route cuts through these mountains en route to Montreal. New England is also easily accessible from the Hudson Valley, particularly the Berkshire Hills in western Massachusetts, and the Connecticut shore.
