2 mile hiking trail located near Naperville, Illinois
Starting from the dam that you'll find after following the Dupage River Trail West, you'll go downhill facing toward the left side of the dam, from there, go through the tall grass, you should see a sign, and then the trail will follow the river until you hit McDowell Grove Forest Preserve
http://www.tripleblaze.com/trail.php?c=3&i=8772