Grand Canyon National Park
P.O. Box 129
Grand Canyon, AZ 86023-0129

Phone: 928-638-7888

The park, focusing on the world-famous Grand Canyon of the Colorado River, encompasses 277 miles of the river, with adjacent uplands, from the southern terminus of Glen Canyon National Recreation Area to the eastern boundary of Lake Mead National Recreation Area. The forces of erosion have exposed an immense variety of formations which illustrate vast periods of geological history.