Deer Mountain Campground is a primitive 25-site campground located in Connecticut Lakes State Forest adjacent to the Connecticut River between Second and Third Connecticut Lakes, offering excellent access for fishing and paddling enthusiasts.

Each site includes a fireplace, picnic table, and parking space, with no hookups available; some walk-in sites require a half-mile hike.

The campground is situated in "Moose Alley" just 5 miles from the Canadian border and provides easy access to the Cohos Trail and multiple Connecticut Lakes for recreation, though visitors should note there is limited to no cell service and basic facilities (pit toilets, no showers).