Arnold Air Force Base (AFB) comprises ca. 15,800 ha in the Barrens region of south-central Tennessee. General herpetofaunal field collecting techniques were used to survey low-lying forests subject to seasonal flooding, dry forested slopes, old fields, intermittent and permanent streams, and a 1611-ha reservoir. Sixty species were found, comprising 46% of the known state- and 75% of the suspected Barrens-herpetofaunal species. Several species listed as needing special protection by state or federal agencies occur at the site, including Rana capito, Hyla gratiosa, Ambystoma talpoideum, Hemidactylium scutatum, Pituophis melanoleucus, and Ophisaurus attenuatus. Significant extensions or clarifications of distributions were noted for R. capito, Ambystoma texanum, Nerodia erythrogaster, Virginia valeriae, Thamnophis sauritus, Pseudemys concinna, and Kinosternon subrubrum.