Its name is derived from a wonderful echo of ten words returned from the smooth wall seen in the cut on page 203.

It is only a mile long with walls of 600 feet.

At its head enter the Yampa River and Canyon, which mark the foot of Lodore, the most striking gorge, next to the Grand Canyon, on the whole river.

Lodore is only 20 miles long, but it is 20 miles of concentrated water-power energy and grandeur, the fall being about 400 feet, the walls 2700.

Never for a moment does it relax its assault, and the voyager on its restless, relentless tide, especially at high water, is kept on the alert.