There is another descent of 460 feet to the Grand Wash, and then 149 to the mouth of the Virgen.

Next to the Kaibab division of the Grand Canyon, the greatest declivity occurs in the Uinta region, in the Canyon of Lodore.
The profile of the river in these two districts is approximately given on page 57.

The average depth of the Grand Canyon is about 4000 feet.
Its width at the top varies from 4 1/2 to 12 miles.

This is the extreme outer cliff-line.

The inner gorge is much narrower, at the Toroweap being only about 3500 feet.