How big is Grand Canyon National Park?

The Grand Canyon National Park encompasses an area of 1,217,282 acres (4,926.08 square kilometers), according to the National Park Service. It stretches for 277 miles (446 kilometers) along the Colorado River and varies in width from 4 to 18 miles (6 to 29 kilometers). The canyon is approximately 1 mile (1.6 kilometers) deep on average, with some points reaching depths of over 1.8 miles (2.9 kilometers).