The Vail site is a prehistoric Native American archaeological site in the remote north of Oxford County, Maine. It is located along an ancient course of the Magalloway River in an area that is occasionally under the waters of the man-made Aziscohos Lake. The site was discovered in 1979, and has been the subject of several archaeological excavations since then. The site includes at least eight encampment areas (tent sites) and a significant kill zone where the Native Americans killed a large number of caribou. A 1-acre (0.40 ha) section of the site was listed on the National Register of Historic Places in 1980; this listing was enlarged to 7.5 acres (3.0 ha) in 1984.