History

The communal bison drive — called “piskan” in Blackfoot — was the economic and cultural foundation of the Northern Plains peoples for millennia before European contact. The technique required sophisticated landscape management and collective action: men and women placed stone cairns in V-shaped lanes stretching 3–4 km across the prairie, guiding a bison herd toward the narrowing approach to the cliff. Runners posted behind the cairns waved bison-skin robes and shouted to keep the animals moving forward; as the drive lane narrowed and the animals crowded together, the momentum of the herd prevented the lead bison from stopping, driving them over the 10-metre cliff. Below the cliff, hundreds of animals could die in a single drive event; the entire community processed the carcasses immediately, preserving meat by drying, making pemmican (dried meat mixed with fat and berries), tanning hides for clothing and shelter, and using bones for tools. A single successful drive could sustain a band through the winter.

Head-Smashed-In takes its name from a Blackfoot oral tradition: a young man who wanted to watch the bison fall from below the cliff was buried under the falling carcasses when the drive was unusually productive. Excavations beginning in the 1930s and continuing through the 1980s revealed approximately 12 metres of compressed bone, stone tools, and butchering debris — the product of thousands of drive events over nearly six millennia. The deepest layers correspond to the Archaic period (before 1000 BC), and the sequence continues through the Prehistoric and Historic periods to the final years of the great bison herds in the 1880s. The site was declared a UNESCO World Heritage Site in 1981, and the interpretive centre built into the cliff face in 1987 remains the primary means of public access and education, operated in close collaboration with the Piikani Nation.