Fox River Watershed

About the Watershed

The Fox River originates in Waukesha County, Wisconsin and flows through Illinois into the Illinois River at Ottawa, Illinois. The entire Fox River watershed encompasses 938 square miles in Wisconsin and 1720 square miles in Illinois. 

The Lake County portion of the watershed runs the entire length of the western border of the county. 


  • Fish Lake Drain
  • Flint Creek
  • Sequoit Creek
  • Slocum Lake Drain 
  • Squaw Creek 
Fox River Watershed Map

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