The river varies in width from 500 or 600 feet to 75 or 100.

In this canyon is water-power enough to run the machinery of the world, and there is as much more in the canyons above.
Joining Marble Canyon on the north is Glen, 149 miles long, from the Paria to Fremont River.

It has but one rapid of consequence.

At high water, with the exception of this rapid, the tide sweeps smoothly and swiftly down with a majestic flow.

The walls are homogeneous sandstone, in places absolutely perpendicular for about a thousand feet.