The Lehner Mammoth-Kill Site is in southern Arizona (Cochise County) on the west bank of the San Pedro River 1.5 miles southwest of the town of Hereford.

In 1988, Mr. and Mrs. Lehner donated the site to the Bureau of Land Management for the benefit and education of the public.

In the initial effort, thirteen fluted projectile points, with 2 damaged, and 8 stone tools were found as well as 9 mammoth remains, one bison, a horse, and a tapir.

[8] Bones of a variety of game—twelve immature mammoths, one horse, one tapir, several bison, one camel, one bear, several rabbits, and a garter snake—were excavated at the Lehner site.

In addition to the obvious artifact remains, an inter-disciplinary group of scientists including archaeologists, botanists, geochronologists, geologists, paleontologists, palynologists, and zoologists have studied and interpreted a wide range of data from the site.