The valley is an approximately four mile section of Charrette Creek which has a relatively wide floodplain ( about 0.25 mile wide ) between high canyon walls ( about 300 feet high ) .
Grand Canyon is a valley in Warren County in the U.S. state of Missouri .
The valley is an approximately four mile section of Charrette Creek which has a relatively wide floodplain ( about 0.25 mile wide ) between high canyon walls ( about 300 feet high ) .
Grand Canyon is a valley in Warren County in the U.S. state of Missouri .