Last Green Valley National Heritage Corridor consists mostly of the Eastern New England Upland, part of the 237,600 km New England-Acadian forest that has a humid continental climate with warm summers and cold winters.
The corridor consists mostly of the Eastern New England Upland, transitioning to the coastal forests to the south and east. The New England-Acadian forests are a temperate broadleaf and mixed forest ecoregion in North America that includes a variety of habitats on the hills, mountains and plateaus of New England in the Northeastern United States and Quebec and the Maritime Provinces of Eastern Canada. 237,600 km (91,700 sq mi) This ecoregion has a humid continental climate with warm summers and cold winters. 
