Provin Mountain is a very narrow traprock mountain ridge located in the Connecticut River Valley of Massachusetts. It is part of the Metacomet Ridge which extends from Long Island Sound near New Haven, Connecticut, north through the Connecticut River Valley of Massachusetts to the Vermont border. Provin Mountain is known for its scenic cliffs, unique microclimate ecosystems, and rare plant communities. It is traversed by the 114 mile (183 Km) Metacomet-Monadnock Trail.