Landscapes of the Central Valley The Central Valley is a broad region of level land in the midst of New England's hills. Through this lowland runs the 75-mile long Metacomet Ridge, an abrupt wall of rock rising from the valley floor. Pictured here is the Talcott Mountain section of the Metacomet Ridge, in Avon. Beneath the west-facing cliffs, tobacco barns line the fertile floodplain of the Farmington River.