The park's trails utilize former rail beds from the Sussex Branch of the Delaware, Lackawanna and Western Railroad, which ceased operations in the late 20th century.
The landscape features unique karst topography, resulting in several naturally occurring sinkholes and limestone caves within the park boundaries.
The park contains the remnants of the Andover Iron Company, which played a major role in the regional iron industry during the 1800s.
The park is a managed segment of the New Jersey state park system that connects two significant regional multi-use rail trails.
The area's limestone geology supports specialized plant communities, including several species of rare calcareous wetland ferns.
Kittatinny Valley State Park spans over 5,000 acres of diverse landscape, including former railway corridors, limestone valleys, and varied wetlands. The park is anchored by the historic village of Andover Junction, which features structures dating back to its mid-19th-century industrial origins. The terrain is defined by the Paulins Kill and Pequest River valleys, offering extensive reclaimed rail-trails suitable for walking and cycling. The park serves as a primary hub for the Sussex Branch Trail and the Paulins Kill Valley Trail, which intersect within its boundaries. Its geological features include karst topography characterized by sinkholes and limestone outcrops. Wildlife enthusiasts frequent the park for birding and observing deer, wild turkeys, and occasional black bears. The site is a popular destination for fishing, particularly at the various ponds found throughout the park property.
The trestle bridges along the rail-trails offer the most distinct perspectives of the surrounding valley landscape.
Bring a portable GPS or offline maps, as cell service can be unreliable in the valley bottoms.
Ensure your footwear has good traction, as some limestone trail sections can become slick or uneven after rain.
Check for ticks during warmer months, as the mix of dense forest and tall meadow grasses is high-risk habitat.
Attempting to traverse the entire length of the linked rail-trail systems without pre-planning, as the trails extend many miles beyond the park perimeter.
Park grounds are generally accessible dawn to dusk year-round, though some secondary trails may be seasonally restricted or muddy in early spring.
Carry-in/carry-out policy for all trash; stay on marked trails to protect sensitive limestone-based plant species.
