Low Elevation
< 730 feet above mean sea level
Low Place
Fox River
Low Quad Name
Crystal Lake
Low PLSS
3-34-43N-8E
Low Geology
Cahokia Alluvium, river valley
High Elevation
> 1189 feet above mean sea level
High Place
unnamed hilltop
High Quad Name
Harvard
High PLSS
3-17-46N-6E
High Geology
Woodstock / Marengo Moraine
Area
606.12 square miles
Total Relief
459 feet
Percent Slope
1.24%