The Metacomet Ridge continues north from Besek Mountain as Higby Mountain and south as Trimountain. The east side of Besek Mountain drains into the Coginchaug River, thence to the Connecticut River and Long Island Sound; the southwest side drains into the Muddy River, thence into the Quinnipiac River and Long Island Sound; and the northwest side into Harbor Brook, thence into the Quinnipiac River.