An inventory of amphibians and reptiles at Hopewell Furnace National Historic Site (HOFU) was conducted from July 2000 through November 2001. Two methods were used: general herpetological collecting and anura calling surveys. These methods were used to inventory the herpetofauna in 14 habitat types: upland forest, lowland forest, weedy fields, pastures, animal pens, hay fields, corn fields, open wetlands, vernal pools, runs (small streams), French Creek, rock fields, buildings and associated grounds, and mixed habitats (consisting of two or more of the above). These 14 habitat types encompassed virtually the entire park. For all habitat types combined, 33 surveys were conducted, averaging 6.5 person-hours per survey.