How long is the Grand Canyon?

The Grand Canyon is approximately 446 kilometers (277 miles) long, making it one of the most iconic geological features in the United States and around the world. This impressive length is a result of millions of years of erosion by the Colorado River, carving through layers of rock, creating the spectacular and expansive canyon that we see today. The canyon varies in width and depth, but it is the longitudinal measurement that most accurately reflects its vast expanse across northern Arizona. The other options do not accurately represent the full extent of the Grand Canyon’s length, as they fall short of this significant figure.