Lowest and Highest Points in Cook County

Lowest and Highest Points in Cook County
Low Elevation: 
<580 feet above mean sea level
Low Place: 
Lake Michigan Shoreline
Low Quad Name: 
Chicago Loop (etal.)
Low PLSS: 
3-28-40N-14E
Low Geology: 
Ravinia Formation, beach deposits
High Elevation: 
>950 feet above mean sea level
High Place: 
unnamed hilltop
High Quad Name: 
Streamwood
High PLSS: 
3-18-42N-9E
High Geology: 
West Chicago Moraine
Area: 
949.20 square miles
Total Relief: 
370 feet
Percent Slope: 
0.64%