This region, lying between the High Plateaus, the Grand Wash, the Henry Mountains, and the Colorado, is perhaps the most fascinating of all the basin.

The relief map at page 41 gives the larger part of it.

In the basin there are also great mountain masses, the fountainheads of the waters which have carved the canyons.

These are Uinta, Zuni, San Francisco, Henry, Pine Valley, Uinkaret, Beaver Dam, Virgen, Navajo, La Sal, and others, some reaching an altitude of more than twelve thousand feet.

The highest peaks of these, and of course those of the Continental Divide on the east, which furnish a large proportion of the water of the Colorado, and the Wind River Mountains on the extreme north, have snow-banks throughout the summer.