Two Week Session at Camp Birch Hill. An overnight summer camp for boys and girls with a focus on fun! Located in the beautiful lakes region of New Hampshire. Camp Birch Hill. A home away from home for boys and girls ages 6-16, Birch Hill welcomes 180 to 200 campers to its grounds in New Durham, NH every summer. The camp¿s elective program lets campers choose from more than 40 different activities--including kickball, paintball, sailing, photography, and more--to create their own specialized schedules during their two-, four-, or six-week stays at the camp. Each camper also gets the option to try new activities during the ¿personal choice period.¿ Nightly programs, campfires, socials, overnight campouts, cookouts, exciting off-camp excursions, and more round out an active, fun-filled summer at Birch Hill.