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Pike County
Low elevation: <425 feet above mean sea level
Place: Illinois River
7.5' quadrangle name: Pearl East
PLSS: 4-34-7S-2W
Geology: Cahokia Alluvium in river valley
High elevation: >880 feet above mean sea level
Place: South edge of the town of Baylis
7.5' quadrangle name: Baylis
PLSS: 4-18-4S-4W
Geology: Cretaceous ridge
Area: 837.40 square miles
Total relief (approximate): 455 feet
Average percent slope: 1.90%
State of Illinois | Illinois Department of Natural Resources | University of Illinois