The Hanging Hills of south central Connecticut, USA are a range of mountainous trap rock ridges overlooking the city of Meriden and the Quinnipiac River Valley 900 feet (274 m) below. They are a sub-range of the narrow, linear Metacomet Ridge that extends from Long Island Sound near New Haven, Connecticut, north through the Connecticut River Valley of Massachusetts to the Vermont border. A popular outdoor recreation resource, the range is known for its microclimate ecosystems, rare plant communities, and expansive views from cliffs that rise abruptly over 700 feet (213 m) above the surrounding landscape. The Hanging Hills encompass the 1,800-acre (7.3 km²) Hubbard Park, designed with the help of landscape architect Frederick Law Olmsted.