The northern border of Bloomfield is formed by the Farmington River. The west side of the town is flanked by Talcott Mountain, part of the Metacomet Ridge, a mountainous trap rock ridgeline that stretches from Long Island Sound to nearly the Vermont border. Notable features of the Metacomet Ridge in Bloomfield include Penwood State Park and the Tariffville Gorge of the Farmington River, on the borders of East Granby, Simsbury, and Bloomfield. The Metacomet Trail traverses the ridge.