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.

Gap Mountain was cleared of timber in the 19th century and used for pasture for nearby dairy farmers.

In the 1960s the mountain was put up for sale and passed hands several times; a housing development and a ski resort were proposed.

The north / middle summits of the mountain are still more or less bare and support extensive blueberry heath.

The parking lots were constructed and are maintained by the Society for the Protection of New Hampshire Forests.