Deerfield's northern point is located at the confluence of the Deerfield and Connecticut rivers, with the former flowing through the northwest corner of the town and the latter forming the eastern border of the town. Several brooks and the Mill River also flow through the town. North Sugarloaf Mountain rises above the Connecticut in the southeast corner, providing a panoramic view of the valley and the town center. The Pocumtuck Range rises along the eastern side of town north of Sugarloaf.