Thousands of area residents drive their autos, walk, or ride their bicycles over its bridges or along its banks each day, but few give any thought to why the Fox River has the name it does.
Uncovering such historical mysteries is always somewhat fraught because of the mountain of variables. The river could have been given its name because there are lots of foxes in the area. Or perhaps it was called the Fox River because the river curves, narrows and widens like a fox’s tail.
But the river’s name has nothing to do with the furry fellows once sought for their fur and hunted for their love of raiding the target-rich environment of farmers’ chicken coops.
Instead, the river carries the name of one of the Native American tribes that once lived along its northern reaches a century and more before the U.S. government forced their successors to relocate west of the Mississippi River.
No one really knows what the earliest Native Americans called the river, although we can make a pretty good guess. By the time the first French explorers and traders arrived in northern Illinois in the late 1600s, the Native People were calling the stream “Pestekouy,” a word in the Algonquian language lexicon meaning “bison.”
According to historical and archaeological evidence, the Fox Valley was not used as a permanent home by Native Americans for several decades during the 1500s, 1600s, and early 1700s. Instead, it was a prime hunting grounds for the various tribal bands of the Illinois Confederacy. As herds of varying sizes of Eastern American Bison moved across the prairies of what would one day become Kendall County and our other modern governmental subdivisions, they were followed by various Indian bands, including the Illinois, who harvested them for use as a major source of protein-rich food as well as for other animal-based products they needed for survival.
The Indians conducted large communal bison hunts in the fall using a couple favored methods. Once consisted of contriving to drive a herd over a cliff where the fall would kill dozens of the huge animals. Back in 2005, conclusive evidence of this method of harvesting bison was found at the Lonza-Caterpillar Site along the Illinois River near Peoria.
The other main hunting tactic capitalized on autumn weather when the prairie grass was dry, and communal groups setting the grass afire in a incomplete circle around a bison herd. When the bison attempted to escape through the narrow non-burning opening, they were more easily killed.
Given the Fox Valley’s topography–large expanses of gently rolling prairie broken by occasional hardwood groves and the wooded banks of streams and wetlands–it’s logical to assume bison found the area much to their liking. As did deer, who are creatures of the edges of woodlands.
The Native People, whether intentionally or not, created and maintained ideal habitat for them as well by intentionally burning off the prairies in the autumn, a practice that not only killed saplings springing up on the prairie but also cleared out dead underbrush in the groves. As an added benefit, new growth around the groves’ edges created perfect deer habitat encouraging the growth of another valuable animal hunted for food and the many products that could be made from its bones and skin.
But getting back to the Fox River’s name, the Indians who hunted the area’s bison probably originally named the river after the large herds found along its banks. We know for sure local Native Americans hunted bison—around these parts in particular—because during an archaeological dig in Oswego in 1987, a bison leg bone was recovered from a village cooking fire pit. Kansas State University dated the bone for Oswego’s Little White School Museum, indicating the animal was killed about 1400 A.D., well before any Europeans were present in North America.
When the French arrived in northern Illinois in the 1600s, they immediately understood the importance of the Illinois River valley as a trade highway from the Great Lakes to the Mississippi River system. The river’s northern tributary, the DesPlaines, was within easy walking distance of the sluggish Chicago River, which emptied into Lake Michigan. The short distance from the Chicago to the DesPlaines meant a relatively quick trip from Lake Michigan to the Illinois and thence to the French colonies in southern Illinois—providing there was enough water in the upper DesPlaines. During periods of low water, the Chicago to DesPlaines portage could stretch 60 miles all the way downstream to the mouth of the Kankakee where the Illinois River formed from the two daughter streams.
As the French traveled that route after reaching the Illinois, they were well aware of the towering sandstone bluff that rose from the river near its junction with the Pestekouy. Called simply le Rocher (the Rock) by the French, today’s Starved Rock area provided the location for a series of French forts and trading posts. The first known map that named the Fox River as the Pestekouy was drawn by Jean-Baptiste Louis Franquelin in 1684. As late as 1688, the Venetian Conventual friar Marco Coronelli drew a map (undoubtedly making liberal use of Franquelin’s map) that labeled the river as the “Pestconti,” a clear Italianization of the French spelling.
When French attention drifted away from northern Illinois, the name of Pestekouy was gradually lost. In fact, for several decades when the river was shown on maps at all it was unnamed. Louvigny in 1697 and DeLisle in 1718 both produced maps depicting the area with the Fox River unnamed.
The name may have disappeared because during that period, the river apparently lost its original connection with the bison herds. And that may possibly have been due to their eradication in the area due to over-hunting by French hide hunters. Between late 1702 and 1704, the French killed and skinned 12,000 Illinois bison with the aim of shipping the tanned hides back to France. The scheme failed, but nevertheless seems to have seriously depleted the state’s bison population, possibly leading to the animals’ eventual total disappearance in the first decade of the 19th Century.
With the bison mostly out of the picture, the Fox became known by most French travelers as the River of the Rock, undoubtedly due to the proximity of the stream’s mouth to Starved Rock. A map drawn by Dutch cartographer J. Ottens in 1754 entitled “Map of the English and French possessions in the vast land of North America” shows the Fox River with the name R. du Rocher – “River of the Rock.”
Even by that era, however, the river may have been given its current name by people living, working, and warring in its environs. Vicious warfare between the French and the Fox Indians had been in progress since the late 1600s. In the early 1700s, parts of the tribe were reported living on the upper reaches of the river. Since the Foxes were considered threats to the entire French empire in North America, the unnamed stream on which large bands of them made their homes probably led to the river’s final name.
By the late 1700s, the name had been finalized. Between 1764 and 1775, Thomas Hutchins, an engineer with the 60th Royal American Regiment, traveled throughout what is now the Midwest on a mapping and reconnaissance mission. In 1778, Hutchins published “A New Map of the Western Parts of Virginia, Pennsylvania, Maryland, and North Carolina…,” which included the Illinois River valley and on which Hutchins clearly labeled the Fox River.
Names can tell a lot about an area’s history. Even the history behind a short name like Fox River can trace the comings and goings of Indian tribes, imperial intrigues, intrepid explorations, and bitter warfare. What’s in a name? It’s everything that makes history interesting.