The southern portion of the township lies between the Hackensack River and Pascack Brook, and is relatively flat. The northern portion slopes down from rolling hills in the west into Lake Tappan to the east. Much of the land is developed as suburban single-family residences, but there remain some undeveloped areas. The undeveloped areas are mostly wooded and are south and west of Lake Tappan, following the Cherry Brook and the Hackensack River watershed. In 1996, plans to develop watershed land received resistance from the community. In the southwest of the township, the Pascack Brook County Park also preserves a wooded area. There are three golf courses in the township, two 18-hole public courses, and a private 18-hole course.