The Kittatinny Mountain Tunnel is a tunnel which carries the Pennsylvania Turnpike through Kittatinny Mountain in Franklin County, Pennsylvania. One of seven tunnels completed for the turnpike, and one of four still in use today, it is located west of the Blue Mountain Tunnel, separated by the Gunter Valley.
The Kittatinny Mountain Tunnel's western portal is featured on the first postcard during the opening sequence of National Lampoon's Vacation.