Map of the Colorado River and Major Tributaries Below Glen Canyon Dam

Canyon Locations:

Most of Glen Canyon lies beneath Lake Powell. The uninundated part extends from Glen Canyon Dam to just above Lees Ferry.
Marble Canyon extends from just below Lees Ferry to near the mouth of the Little Colorado River.
Grand Canyon extends from near the mouth of the Little Colorado River to Lake Mead, which lies off the map, about 55 miles (90 kilometers) downstream from the mouth of Diamond Creek.

River Miles

Distances along this part of the Colorado River are generally measured in river miles: miles downstream from Lees Ferry. For example:

• The mouth of the Little Colorado River is at approximately River Mile 61.
• The mouth of Kanab Creek is at about River Mile 143.
• The mouth of Diamond Creek is at about River Mile 226.

See suggestions for further reading for the sources of information on this page.