The tallest Mountain in Illiniois is not a Mountain, it does not even qualify as a hill or prominence. it might even be called something short of a mound. Wheat fields in Colorado are at three times the altitude and elevation. The tallest 'mountain' in Illinois is Charles Mound at 374 m or 1,227 ft. Latitude/Longitude 42.504 / -90.24
There are no major mountains in Illinois.
zero
Illinois does not have mountains. It is known as the Prairie State for a reason. The highest point is a hill called Charles Mound which has elevation 1235 feet.
In Illinois
There are no mountains.
the rocky mountains
The Illinois General Assembly is comprised of the Illinois House of Representatives and the Illinois Senate.
east
Atlas Mountains.
Illinois does not get hurricanes. It is too far from the ocean.
The Rocky Mountains?
Cardiff is a city area with no mountains