The Metacomet Ridge extends north from Talcott Mountain as Hatchet Hill and south as Farmington Mountain. The north and west sides of the mountain drain into the Farmington River, thence into the Connecticut River and Long Island Sound. The Farmington River runs along the west base of the mountain, cutting through the Metacomet Ridge between Talcott Mountain and Hatchet Hill at the Tarrifville Gorge. The east side of the mountain drains into the Park River, thence into the Connecticut River and Long Island Sound.