Charles Mound is the highest natural point in Illinois. (
The highest point is the Willis Tower, formerly known as the Sears Tower.)
The top of the hill is about 0.25 miles (400 m) from the Wisconsin border.
It is within the  Driftless Area, a region of Illinois, Iowa, Minnesota, and Wisconsin that was not covered or ground down by the last continental glaciers.
The hill itself is an erosional remnant, similar to that on which the original village site of Scales Mound was located.
Shallow Elizabeth silt loam soil is on the summit and the surrounding area has deeper silty clay loam of the Lacrescent series.
Charles Mound is the highest natural point in Illinois. (The highest point is the Willis Tower, formerly known as the Sears Tower.) The top of the hill is about 0.25 miles (400 m) from the Wisconsin border. It is within the  Driftless Area, a region of Illinois, Iowa, Minnesota, and Wisconsin that was not covered or ground down by the last continental glaciers. The hill itself is an erosional remnant, similar to that on which the original village site of Scales Mound was located. Shallow Elizabeth silt loam soil is on the summit and the surrounding area has deeper silty clay loam of the Lacrescent series.
Charles Mound