Lowest and Highest Points in Montgomery County
Low elevation: <510 feet above mean sea level
Place: Shoal Creek
7.5' quadrangle name: Sorento North
PLSS: 3-21-7N-4W
Geology: Cahokia Alluvium/Illinois Glasford till in river valley
High elevation: ~767 feet above mean sea level
Place: Bald Knob
7.5' quadrangle name: Bald Knob
PLSS: 3-36-4N-2W
Geology: Hagarstown ridge
Area: 701.92 square miles
Total relief (approximate): 257 feet
Average percent slope: 0.84%
Updated 10/1/2009 JKH