The Spruce Hole Bog, locally known as Spruce Hole, is a complete ecological community occupying a true kettle hole in the town of Durham, New Hampshire. According to the National Register of Natural Landmarks: "It illustrates characteristics of a typical sphagnum-heath bog, localized in a specialized geologic setting." It was designated a National Natural Landmark in 1972. Spruce Hole is located two miles west of the town center of Durham, and is owned by the town.