The town is bordered on two sides by mountains, with East Mountain and Bald Mountain to the west, and the Hoosac Range to the east. Between the two ranges, Hudson Brook and the north branch of the Hoosic River flow through the valley, merging just south of the town line. In the northern part of the valley is Clarksburg State Park, operated by the state's Department of Conservation and Recreation. The park is home to Mauserts Pond and offers picnicking, hiking, and camping, as well as other recreational activities. On the Vermont side of the border lies the Green Mountain National Forest. The Appalachian Trail crosses from north to south through the town, passing just west of the peak of East Mountain, the highest point in town, at .