6,421 acre (26 km²) Worthington State Forest runs more than seven miles (10 km) along the Kittatinny Ridge in Columbia, in Warren County, on the New Jersey side of the Delaware River, just north of the Delaware Water Gap in the Delaware Water Gap National Recreation Area. The park offers hiking, camping (including a hike-in, primitive area) and canoeing and kayaking on the Delaware. There are some twenty miles of hiking trails within the park, including seven miles of the Appalachian Trail (AT), which passes through the park. The park is operated and maintained by the New Jersey Division of Parks and Forestry.
The forest includes the 1,085 acre (4.4 km²) Dunnfield Creek Natural Area; the creek is designated a Wild Trout Stream. The Sunfish Pond Natural Area, at 258 acres (1.0 km²), is a glacial lake, surrounded by a chestnut oak forest reached by a steep and rocky climb along the AT. Mount Tammany, at 1527 feet (465 m), offers view of the Delaware Water Gap.
The Old Mine Road, one of the earliest roads in the area, runs along the Delaware; it was used for transporting copper and slate from nearby mines and quarries, and is believed to have originally been a Native American trail that saw use by fur traders and Dutch settlers.