Trivia: Which river flows through the Grand Canyon?
Colorado
Rio Grande
Mississippi
Missouri
The correct answer is Colorado
So why is this answer correct? : The Grand Canyon was formed by the Colorado River, which flows down from the Rocky Mountains, through the canyon, and out to the Gulf of California — draining water from 41,070 square miles of land during its course. Smaller rivers in the canyon that feed into it include the Little Colorado, the Paria, and the Havasu and Kanab Creeks.