Duke Farms Hillsborough br guided by the child's hand br to Walk on the Wild Side br br Duke Farms, a 2,700-acre estate in Hillsborough, New Jersey, is a family-owned operation that strives to be a role model in environmental preservation. The estate is home to nine lakes that house ten-pound largemouth bass, catfish, and 100-year-old snapping turtles. Explore the land on a 'Birding by Bicycle' nature program, or join a certified tree expert on a walk through the farm for the Tree Identification Program. The kids will love the 'Walk on the Wild Side'—a 1.25-mile tour on a self-guided nature trail full of local wildlife and native flora.