As its name suggest, this site is part of the headwaters and watershed of the Kishwaukee River.  Beginning as a simple trickle or seep, the wetland communities of this site and the area directly to the north supply the initial surface flow of the Kishwaukee River.  The Kishwaukee River is recognized as one of the most biologically rich river systems in Illinois and is characterized by the Illinois Department of Natural Resources as a biologically significant stream.

In 2005, the fields were harvested one last time and marked the transition from over 150 years of agricultural practice back to an ecologically sustainable prairie landscape.  Take a hike on the 1.75 miles of trail and check out this restored prairie.