Hudson River Valley (N.Y. and N.J.) Hudson River (N.Y. and N.J.) Peace River Valley (B.C. and Alta.) Okanagan River Valley (B.C. and Wash.) Yukon River Valley (Yukon and Alaska) Shenandoah River Valley (Va. and W. Va.) Merrimack River Valley (N.H. and Mass.) Delaware River Valley (N.Y.-Del. and N.J.)