Gap Mountain, located in Troy, New Hampshire, United States, is a small monadnock with three summits ranging between 1,820 feet (555 m) and 1,900 feet (579 m) above sea level. The lower north and middle summits are mostly bald and offer panoramic views of the surrounding rural landscape and of the higher and more popular Mount Monadnock. The Metacomet-Monadnock Trail passes over the north and middle peaks. The higher southern summit is wooded with no views.