One of Sussex County’s largest municipalities in size, Walpack is also the least populated and will most certainly remain that way. At just over 24 square miles, the township covers some of the most rugged land in the county as it stretches through steeply sloped valleys along the Delaware River. Walpack was absorbed into the Delaware Water Gap National Recreation Area, a 70,000 acre federal park.
Many of Walpack's links to the past can be seen along Old Mine Road, believed to be one of the oldest highways in the United States.
