Deer Mountain Campground is located in Connecticut Lakes State Forest, adjacent to the Connecticut River between Second and Third Connecticut lakes, Deer Mountain Campground is just five minutes south of the Canadian border. It is adjacent to the stretch of US-3 north of Pittsburg, referred to as Moose Alley, which makes it a prime location for moose viewing. The campground consists of a 25-site primitive campground. It opens for walk-in camping beginning in May.

The Connecticut Lakes Headwaters Working Forest Recreation Program, managed by the State of New Hampshire in cooperation with The Forestland Group, provides high-quality recreational opportunities that are consistent with a Forest Legacy Easement held by the State of New Hampshire. The property, owned by The Forestland Group, is a working forest and care should be taken on the roads and in the forest.