Marble Canyon is the section of the Colorado River canyon in northern Arizona from Lee’s Ferry to the confluence with the Little Colorado River, which marks the beginning of the Grand Canyon.
Lee’s Ferry is a common launching point for river runners starting their journey through the Grand Canyon. Marble Canyon is also well known for the Navajo Bridge, where US Highway 89A crosses the Colorado River.
Marble Canyon marks the western boundary of the Navajo Nation. In 1975, the former Marble Canyon National Monument, which followed the Colorado River northeast from the Grand Canyon to Lee’s Ferry, was made part of Grand Canyon National Park.