This was a significant historical site in the expansion of the pre and post American West. This river crossing and Council Grove, with it's Post Office Oak was the important rendezvous point on the High Plains. The crossing was first recorded in 1541 - Coronado, on the return leg of his journey in search of "The Seven Cities of Gold", crossed the Neosho River
where Council Grove
, Kansas now exists.
In 1825 - By a council under a tree, (the Council Oak), a treaty was signed with the Osage Native American tribe and the United States Government obtaining the right of way for a public highway. Established as the Sante Fe Trail.
Of the Neosho River Crossing of the famous and historical Santa Fe Trail, it is recognized that Council Grove's West Main Street was platted along the actual route of the Santa Fe Trail.