Grand Canyon is in the northwest corner of Arizona, close to the borders of Utah and Nevada. The Colorado River, which flows through the canyon, drains water from seven states, but the feature we know as Grand Canyon is entirely in Arizona. Most of Grand Canyon lies within Grand Canyon National Park and is managed by the National Park Service.
Most people measure the canyon in Colorado River miles.
It begins at Lees Ferry and ends at Grand Wash Cliffs. Grand Canyon is only one of many beautiful canyons carved by the river. Others include Cataract Canyon and Glen Canyon, the latter now lying beneath the waters of Lake Powell. Most people agree, however, that Grand Canyon is the most spectacular. No other place in the world looks quite like it.