Moving to the northeastern border along the Passaic River there is a seasonally inundated floodplain characterized by pin oak, red maple, and ash. The entire southern perimeter is comprised of abandoned farm fields in various stages of transition to woodland. The extensive wooded central region is mainly swamp dominated by pin oak, blueberry, and hummocks of sedge. Pockets of drier woods contain white oak, beech, black birch, and shagbark hickory. An extensive range of programs is conducted focusing on local environmental issues, natural history, archeology, and outdoor recreation.
Trails are open every day of the year from dawn to dusk.
Several special events are conducted throughout the year. This area used to be part of the estate of William Alexander, the Lord of Stirling, who served as a major general in the Continental Army. The site of his elegant Georgian Manor is located in a nonpublic area of the park. William Alexander, being considered by many rightfully entitled to an earldom in Scotland, which he vainly endeavored to obtain, he was by courtesy called Lord Stirling. Born in New York in 1726, he received an excellent mathematical education, and was distinguished as a man of science.