Des Plaines River

Lat/Long: 41.391182, -88.257778

Originating in southern Wisconsin, the Des Plaines River flows south into Lake and Cook counties northwest of Chicago, eventually turning southwest and meeting the Kankakee River to form the Illinois River.

"Map of the Des Plaines River Drainage Basin," last modified July 6, 2013, accessed June 6, 2018, https://en.wikipedia.org/wiki/Des_Plaines_River#/media/File:Des_Plaines_River.png.