A buffalo jump is a cliff formation that Indigenous peoples of North America historically used to hunt and kill plains bison.
Here is a quote from the journal of Meriwether Lewis, an early explorer of the American West, describing a buffalo jump.
"One of the most active and fleet young men is selected and disguised in a robe of buffalo skin... he places himself at a distance between a herd of buffalo and a precipice proper for the purpose; the other Indians now surround the herd on the back and flanks and at a signal agreed on all show themselves at the same time moving forward towards the buffalo; the disguised Indian or decoy has taken care to place himself sufficiently near the buffalo to be noticed by them when they take to flight and running before them they follow him in full speed to the precipice; the Indian (decoy) in the mean time has taken care to secure himself in some cranny in the cliff... the part of the decoy I am informed is extremely dangerous. The indigenous peoples drove the buffalo over this cliff."
Although Lewis described a buffalo jump in detail, neither Lewis nor any white settlers are known to have personally witnessed the events.
From my reading of material about Blue Mound State Park during my childhood and adult life, I believed that this cliff was the site of a buffalo jump. Although local historians also believed this, the Minnesota Department of Natural Resouces does not mention a buffalo jump in its Blue Mounds State Park description.
Nevertheless, the cliff is a good example of the Sioux Quartzite formation, which forms the backbone of the local landscape and is a dramatic feature in the surrounding prairie.